user2176: Was Buddha a Man or Woman?
Was he/she sometimes know as a man and sometimes as a woman?
Why was he/she sometimes know as a man and sometimes as a woman?
What was his/her real gender?
Give proof please.

user295: Though is modern times this might seem controversial Bahu Dhātuka Sutta mentions certain things a woman cannot achieve:

He understands that it is impossible, there is no chance, that a woman would become a worthy
  fully self awakened one—this is not possible.
And he understands that it is possible, there is the chance, that a man would become a worthy fully
  self-awakened—this is possible.
He understands that it is impossible, there is no chance, that a woman would become a universal
  monarch—this is not possible.
And he understands that it is possible, there is the chance, that only a man would become a universal
  monarch —this is possible.
He understands that it is impossible, there is no chance, that a woman would attain the state
  of Sakra—this is not possible
...

For more comparative discussion on this matter see: On Women’s Inabilities by Piya Tan and The Bahudhātuka-sutta and its Parallels On Women’s Inabilities by Ven. Anālayo

user151: The Buddha was a man. I have no idea why everyone is trying to dodge obvious conceptual truth. I don't need an argument for this just like I don't need an argument for the fact that the Earth is round. 

user3652: One has to understand this: "Buddha" because it connotes being awakened by light. The word Buddha doesn't even makes mention of male or female. Both may become enlightened and both can be awakened by Light. Such is the writings and mantras and such are as if like alien from the higher consciousness we must reach and to go through all those prayers, rituals, etc to reach that higher consciousness or just accept of which there is a lot within the writings of such the word 'acceptance'. Remember, just like many beings throughout history had many encounters and raised up a religion or as they say, enlightened. taught by Beings from the days of Egypt and so on. The Encounter brought about a great deal of information and if you notice, they speak about the goddess not a male. The male, the Buddha reach a higher consciousness by the contact with this female or so if it was, from another world/your alien is and has always been here. saved many documentations of the past and shared it with beings on this earth or to whom they considered they like to share. Namaste. "Know Thyself"

user832: Buddha is not a man or a woman. Those are aggregates. Buddha is beyond words or descriptions. 
https://www.facebook.com/suzukiroshi

Just to sit is much better than to see all the buddha in the world
  [laughs].

The only proof is experience. There is no convincing anyone.
http://www.brainyquote.com/quotes/authors/s/shunryu_suzuki.html

If you cannot bow to Buddha, you cannot be a Buddha. It is arrogance.
  Shunryu Suzuki


user2190: The answer to this question has a lot of things that change the answer, depending on whom you ask. It would depend on which Buddha we're talking about, which lineage, which region, which culture, and which set of histories we're willing to accept as historical fact. As such, there is no singular answer which could possibly suffice.
The Buddha, historically, was male: his name was Siddhartha Gautama and his title was Shakyamuni because he was a prince and later king of his tribe in Nepal. He called himself "Buddha" because it connotes being awakened by light. As such, anyone who has reached this level of personal and spiritual evolution is considered to be "a Buddha".
In some lineages, female Buddhas exist; in most, all Buddhas are required to be male.
In some cultures, the mere idea of a female Buddha is offensive; in others, the idea is acceptable; and in still others, the idea that anyone has a problem with that at all is offensive.
In some histories, there is acceptance of the story of Guanyin (also called Kwan Yin), who is sometimes called the "Medicine Buddha". But she is also considered a goddess of healing and a Taoist immortal, among a few other highly-regarded titles.
One of the teachings of the Buddha is to overcome preconceptions. If we're bound to the idea that only men can become Buddha, it would make sense that the Buddha might reincarnate as a female to try to teach this idea, perhaps after being a male who seeds the idea.
Again, there are so many, many ideas out there about this that there is no singular correct answer. And so to answer, I would just write: "it's not outside of the realm of possibilities, either way".

user2265: Buddha is a title for any being who after much compassionate work as a bodhisattva, achieves Buddahood. (This begs the important, approachable question what is a bodhisattva? Not meant to be asked, but researched.)
A Buddha does not enter Nirvana until all beings are saved.
The original Buddha of our little planet Earth was Shakyamuni Buddha, male inheritor of the Shakya kingdom. He was also known as Gautama, especially by the Hindus.

user43: Sounds like a koan. Are you a hidden Zen master? ;) "Is Buddha a man or woman?" -- "Buddha is awesome!" :)
Seriously, Buddha is your own true nature, how can it be limited to gender?

2176: <p>Was Buddha a Man or Woman?<br>
Was he/she sometimes know as a man and sometimes as a woman?<br>
Why was he/she sometimes know as a man and sometimes as a woman?<br>
What was his/her real gender?
Give proof please.</p>
 295: <p>Though is modern times this might seem controversial <a href="http://www.themindingcentre.org/dharmafarer/wp-content/uploads/2009/12/29.1a-Bahudhatuka-S-m115-piya.pdf" rel="nofollow noreferrer">Bahu Dhātuka Sutta</a> mentions certain things a woman cannot achieve:</p>

<blockquote>
  <p><strong>He understands that it is impossible, there is no chance, that a <em>woman</em> would become <em>a worthy
  fully self awakened one</em>—this is not possible.</strong></p>
  
  <p><strong>And he understands that it is possible, there is the chance, that a <em>man</em> would become <em>a worthy fully
  self-awakened</em>—this is <em>possible</em>.</strong></p>
  
  <p>He understands that it is impossible, there is no chance, that a woman would become a universal
  monarch—this is not possible.</p>
  
  <p>And he understands that it is possible, there is the chance, that only a man would become a universal
  monarch —this is possible.</p>
  
  <p>He understands that it is impossible, there is no chance, that a woman would attain the state
  of Sakra—this is not possible</p>
  
  <p>...</p>
</blockquote>

<p>For more comparative discussion on this matter see: <a href="http://www.themindingcentre.org/dharmafarer/wp-content/uploads/2009/12/29.1b-On-womens-inabilities-piya.pdf" rel="nofollow noreferrer">On Women’s Inabilities</a> by Piya Tan and <a href="https://www.buddhismuskunde.uni-hamburg.de/pdf/5-personen/analayo/bahudhatuka.pdf" rel="nofollow noreferrer">The Bahudhātuka-sutta and its Parallels On Women’s Inabilities</a> by Ven. Anālayo</p>
 151: <p>The Buddha was a man. I have no idea why everyone is trying to dodge obvious conceptual truth. I don't need an argument for this just like I don't need an argument for the fact that the Earth is round. </p>
 3652: <p>One has to understand this: "Buddha" because it connotes being awakened by light. The word Buddha doesn't even makes mention of male or female. Both may become enlightened and both can be awakened by Light. Such is the writings and mantras and such are as if like alien from the higher consciousness we must reach and to go through all those prayers, rituals, etc to reach that higher consciousness or just accept of which there is a lot within the writings of such the word 'acceptance'. Remember, just like many beings throughout history had many encounters and raised up a religion or as they say, enlightened. taught by Beings from the days of Egypt and so on. The Encounter brought about a great deal of information and if you notice, they speak about the goddess not a male. The male, the Buddha reach a higher consciousness by the contact with this female or so if it was, from another world/your alien is and has always been here. saved many documentations of the past and shared it with beings on this earth or to whom they considered they like to share. Namaste. "Know Thyself"</p>
 832: <p>Buddha is not a man or a woman. Those are aggregates. Buddha is beyond words or descriptions. 
<a href="https://www.facebook.com/suzukiroshi" rel="nofollow">https://www.facebook.com/suzukiroshi</a></p>

<blockquote>
  <p>Just to sit is much better than to see all the buddha in the world
  [laughs].</p>
</blockquote>

<p>The only proof is experience. There is no convincing anyone.
<a href="http://www.brainyquote.com/quotes/authors/s/shunryu_suzuki.html" rel="nofollow">http://www.brainyquote.com/quotes/authors/s/shunryu_suzuki.html</a></p>

<blockquote>
  <p>If you cannot bow to Buddha, you cannot be a Buddha. It is arrogance.
  Shunryu Suzuki</p>
</blockquote>
 2190: <p>The answer to this question has a lot of things that change the answer, depending on whom you ask. It would depend on which Buddha we're talking about, which lineage, which region, which culture, and which set of histories we're willing to accept as historical fact. As such, there is no singular answer which could possibly suffice.</p>

<p>The Buddha, historically, was male: his name was Siddhartha Gautama and his title was Shakyamuni because he was a prince and later king of his tribe in Nepal. He called himself "Buddha" because it connotes being awakened by light. As such, anyone who has reached this level of personal and spiritual evolution is considered to be "a Buddha".</p>

<p>In some lineages, female Buddhas exist; in most, all Buddhas are required to be male.</p>

<p>In some cultures, the mere idea of a female Buddha is offensive; in others, the idea is acceptable; and in still others, the idea that anyone has a problem with that at all is offensive.</p>

<p>In some histories, there is acceptance of the story of Guanyin (also called Kwan Yin), who is sometimes called the "Medicine Buddha". But she is also considered a goddess of healing and a Taoist immortal, among a few other highly-regarded titles.</p>

<p>One of the teachings of the Buddha is to overcome preconceptions. If we're bound to the idea that only men can become Buddha, it would make sense that the Buddha might reincarnate as a female to try to teach this idea, perhaps after being a male who seeds the idea.</p>

<p>Again, there are so many, many ideas out there about this that <strong>there is no singular correct answer.</strong> And so to answer, I would just write: <strong><em>"it's not outside of the realm of possibilities, either way".</em></strong></p>
 2265: <p><strong>Buddha is a title</strong> for <strong>any being</strong> who after much compassionate work as a bodhisattva, achieves Buddahood. (This begs the important, approachable question what is a bodhisattva? Not meant to be asked, but researched.)</p>

<p><em>A Buddha does not enter Nirvana until all beings are saved.</em></p>

<p>The original Buddha of our little planet Earth was Shakyamuni Buddha, male inheritor of the Shakya kingdom. He was also known as Gautama, especially by the Hindus.</p>
 43: <p>Sounds like a koan. Are you a hidden Zen master? ;) "Is Buddha a man or woman?" -- "Buddha is awesome!" :)</p>

<p>Seriously, Buddha is your own true nature, how can it be limited to gender?</p>
