Ailill mac Máta is the king of the Connachta and the husband of queen Medb in the Ulster Cycle of Irish mythology. He rules from Cruachan.

Medb, later spelled Meadhbh, Méabh(a) and Méibh, and often anglicised as Maeve, is queen of Connacht in the Ulster Cycle of Irish mythology. Her husband in the core stories of the cycle is Ailill mac Máta, although she had several husbands before him who were also kings of Connacht. She rules from Cruachan. She is the enemy of Conchobar mac Nessa, king of Ulster, and is best known for starting the Táin Bó Cúailnge to steal Ulster's prize stud bull Donn Cúailnge.