In Yayāti’s (Yayati’s) son Anu’s lineage, Aṅga (Anga) was the eldest of the sons born to King Bali of a male surrogate. Bali crowned Aṅga king of Aṅgadeśa (Angadesha; the land of Aṅga). Dadhivāhana (Dadhivahana) was Aṅga’s son. Under a curse placed on him by the great sage Dīrghatamā (Dirghatama), he was born without apāna (apana) or anus. This is why he was also known as Anapāna (Anapana).
[See Dīrghatamā]