Senthilkumar

Sendhilkumaran is one name for the god housed at the Thiruchendur Murugan Temple, in the town of Thiruchendur, Tamil Nadu, India. The temple is considered to be one of the six major abodes of Lord Muruga. One more meaning of this name is. Who born in red fire of lord shiva. Sen thee il pirantha. Becomes senthil senthilkumaran.
The deity.
Senthil is believed to be from Senthur.
One of the six abodes of Lord Muruga is Thiruchendur where The Lord is believed to have fought the battle with the Asura King Surapadman. Originally the place is called Senthur. Since it acquired the divine significance by being the battleground for Lord Muruga, the honorary prefix 'thiru' was added to it resulting in the name Thiruchendur.
The deity from Senthur is called Senthil. 
It also means 'beautiful' But not Senthil guru.
Many ancient texts decode the word 'Senthil' to be 'The Red One' which implies, 'The Formidable one'.
Lord Muruga is son of Lord Shiva, brother of Lord Ganesha. Senthil is another name for Lord Muruga; he has many names and many abodes. Kumaran means prince.
Senthil means Lord Murugan Name, Murugan means Beauty
Use as a name for individuals.
Senthil Kumaran is a common Tamil name for those born in 1965 and 1986. Many others have variants of the name, such as Senthil Velan, Senthil Nathan, and Senthil Kumar. "Senthil" is derived from the word "senthur".
People with this name will supposedly share a common character.
SENTHIL = Beauty
KUMARAN = Prince
Senthil = Senthur (Thiruchendur) + il (Home / In ), i.e. One who resides in Senthur - Lord Muruga
Murugu means beauty
Therefore, Senthil Kumaran means a beautiful prince.
See also.
Arupadaiveedu: The six major abodes of Lord Muruga