Hanuman's second son was named Purwaganti, who had only appeared during the Pandavas period. He was credited with getting Yudhisthira's lost heirloom named Kalimasada. Purwaganti was born to a priest's daughter whom Hanoman married, named Purwati. Hanuman lived so extended that he was Sick and tired of residing. Narada https://www.youtube.com/watch?v=6cAOQp6Twlc