Yaśomatī (Yaśomati Devi) had two children in the Jain narrations:

• Ceṭaka (Chetaka), a prince and later leader of the Licchavi clan
• Trishalā (Triśalā), who is described as his sister in some accounts and as mother of Mahavira in others through her own line

So, Yaśomatī’s children are Ceṭaka and Trishalā. You can read more here