Arjun’s children.
(+ his kids in the Javanese mhb‼️)
Abhimanyu.
Info: Abhimanyu, the most popular child of Arjun, was a great warrior, portrayed as young, strong and talented. Abhimanyu was one of the people to know the technique to enter the Chakravyuha, a powerful military formation, unfortunately, he died unfairly while in this formation.
Iravan.
Info: Iravan is the second popular son of Arjun, he is the central deity of the cult of Kuttantavar & a village guardian deity. Iravan is revered for his sacrifice & his protection. In one legend, he is married to the enchantress mohini.
(there is much more interpretations/stories of Iravan, so its better to look him up)
Babruvahana.
Info: The harsh son of Arjun & heir of Manipura. Babruvahana was the only child who defeated Arjun, but was about to kill himself after knowing arjun’s identity, but he was given from his stepmother, the Nagi Ulupi, a gem called Nagamani, which revived Arjun.
Shrutakarma.
Info: the youngest of the Upapandavas. Shrutakarma was a capable archer like Arjun and fought very well, he fought many warriors such as Sudakshina, King Chitrasena, Jayatsena, Dushasana and Ashwathama. Unfortunately, he was killed brutally by Ashwathama.
Wisanggeni.
Info: Wisanggeni is a son of Arjun & the lava goddess Dresnala. When he was born, he was already hated by Brahma, in which the creator god threw him into a caldera. However, wisanggeni didn't die but got empowered. In rage by Brahma, he attacked the heavens. No one could defeat him except Antasena (who could only reach him to a draw)
Kumaladewa and Kumalasekti.
Info: Kumaladewa & Kumalasekti are the (male) twin children of Arjun with the demoness Asmarawati. Both siblings are mostly hybrids of a Demi-god and demon, making them possibly powerful. The siblings are seen as hero’s in wayang.
Wilugangga.
Info: born from Arjun & apsara Wilutama, Wilugangga is seen as a hero in Wayang. He helped a king who was facing a hardship, namely a marriage contest, & promised to help him as long as he was told who his father was, the king agreed & after Wilugangga succeeded, he was told who his father was. In the Javanese mhb, he fought Drona but later got killed by him.
Dewi Pregiwa & Dewi Pregiwati.
Info: Pregiwa & Pregiwati are daughters of Arjun & the princess Manuhara and they are only told in wayang.
Pregiwa is said to be loyal, honest, patient, & charming. She had married Ghatotkacha. She is identified with Pragya(?)
Pregiwati is said to be kind, devoted & gentle, and is the twin sister of pregiwa, she once went on a journey to find her father. Pregiwati is identified with Pragati (?)
Sumitra.
Info: son of Arjun and the archer Dewi Larasati, Sumitra is kinda known in wayang. Sumitra is also shown as a charioteer of Abhimanyu, and took part in the Bharatayuda war. he died on the battlefield against Bhishma. (Another version says that he was killed by karna.)
Honorable Mention: Pancala (son of Arjun & Srikandi), but there’s not much info about him I could find.
((Correct me if I got something wrong!!))