Sonita was the country of Asura king Bana or Vana. His daughter Usha married Vasudeva Krishna's grandson Aniruddha.
The link between Sonita kingdom and its king Bana is made clearer in the Bhagavata Purana
King Bana of Sonita is mentioned as follows:- Vasudeva Krishna hath slain Jarasandha, and Vakra, and Shishupala of mighty energy, and Bana in battle, and numerous other kings also have been slain by him (5:130). At (5:64) Krishna is again mentioned as the slayer of Vana and Bhumi's son Naraka (of Pragjyotisha Kingdom). At (9:46) Bana is mentioned as the son of Bali. (Diti (Matriarch) > Hiranyakasipu > Prahlada > Virochana > Bali > Bana (1:65).