Hanuman's next son was named Purwaganti, who experienced only appeared in the Pandavas era. He was credited with finding Yudhisthira's lost heirloom named Kalimasada. Purwaganti was born to a priest's daughter whom Hanoman married, named Purwati. Hanuman lived so lengthy that he was Sick and tired of living. Narada https://www.youtube.com/watch?v=6cAOQp6Twlc