He was originally born as a Kshatriya king but later on due to severe meditation, or Yoga, he received Brahmatva, due to which his descendants were later on known as Brahmins. He is the only Rishi with his name over a purana named Mudgala Purana. Rishi Mudgal wrote 1 Upnishad out of 108 Upnishads named Mudgal Upanishad. Mudgal Upanishad is of a very special type and unique amongst all upanishads ever written. It is the foundation of Vaishnavism, asserting that Vishnu is the Purusha, or primordial person. The great sage strongly believed in simple living high thinking and had a high-level patience amongst other Rishis. That's why still today the persons belonged to Mudgal Gotra are considered highly ethical and had infinite patience in compare to average. History 
Rishi Mudgal was the son of a Chandravanshi  Kshatriya King Bhamyarswa of Panchal Rajya, at present the Punjab State of India. He is considered as one of the Rajarshi in Hinduism next to Vishvamitra. Mudgal lived in a forest and ruled over his kingdom as well as he taught as a Kulguru in a Gurukula.
They were originally born as a Kshatriya royal but later on due to severe meditation, or Yoga, they received Brahmatva, due to which their descendants were later on known as Brahmins. They are the only Rishi with their name over a purana named Mudgala Purana. Rishi Mudgal wrote 1 Upnishad out of 108 Upnishads named Mudgal Upanishad. Mudgal Upanishad is of a very special type and unique amongst all upanishads ever written. It is the foundation of Vaishnavism, asserting that Vishnu is the Purusha, or primordial person. The great sage strongly believed in simple living high thinking and had a high-level patience amongst other Rishis. That's why still today the persons belonged to Mudgal Gotra are considered highly ethical and had infinite patience in compare to average. History
Rishi Mudgal was the child of a Chandravanshi Kshatriya King Bhamyarswa of Panchal Rajya, at present the Punjab State of India. They are considered as one of the Rajarshi in Hinduism next to Vishvamitra. Mudgal lived in a forest and ruled over their kingdom as well as he taught as a Kulguru in a Gurukula.