Hanuman's second son was named Purwaganti, who had only appeared while in the Pandavas period. He was credited with getting Yudhisthira's lost heirloom named Kalimasada. Purwaganti was born to some priest's daughter whom Hanoman married, named Purwati. Hanuman lived so extensive that he was Fed up with living. Narada https://www.youtube.com/watch?v=6cAOQp6Twlc