Deval Rishi was the son of Pratyoosh named Vasu. The eight Vasu (Aap, Dhruv, Som, Dhar, Anil, Anal, Pratyoosh, Prabhaas) were the sons of Daksh's daughter Vasu and Dharm. He had two sons also.

Gajendra also became like Bhagavaan - with four arms. He was a Paandya Vanshee king in his previous life. His name was Indradyumn. He was a great devotee of Bhagavaan so once he abandoned his kingdom and became Sanyaasee. One day he was worshipping Shree Hari, that Agastya Muni came with his disciples. He saw that a man who should be a Grihasth, has  abandoned his duties and is sitting there doing worship. He became angry and he gave him Shaap. "he has insulted Braahman with the elephant-like mind that is why he should become elephant.

After saying this Agastya Muni went away and the king accepted it as his fate. In his next life he was born as Gajendra. This Gajendra once went to drink water from a pond where Graah caught his leg and pulled him deep in the pond. They fought for 1,000 year. When elephant could not get freed, he prayed Hari and hari got him freed by killing Graag. Hari thus freed him from his elephant Yoni and appointed him as His Paarshad, at the same time Graah a;lso got freed from his Graah Yoni and got freed.