Ailill (Ailell, Oilioll) is a male name in Old Irish. It is a prominent name in Irish mythology, as for Ailill mac Máta, King of Connacht and husband of Queen Medb, on whom Shakespeare based the Fairy Queen Mab. Ailill was a popular given name in medieval Ireland, meaning something like "beauty".
Notables named Ailill
Ailill Aulom, early 1st millennium druid and King of Munster
Ailill mac Máta, legendary King of Connacht and husband of Queen Medb
Ailill mac Slanuill, legendary High King of Ireland of the 12th century BC
Ailill Finn, legendary High King of the 8th century BC
Ailill Caisfhiaclach, legendary High King of the 5th century BC
Ailill mac Echach Mugmedóin, half-brother of Niall of the Nine Hostages (5th century AD) Ailill Molt, High King of the 5th century AD Ailill Inbanda (died c. 549), King of Connacht Saint Ailill the First, 6th century Bishop of Armagh Ailill the Second, 6th century Bishop of Armagh Ailill mac Rechtaide, 6th century patriarch of the Ó Faircheallaigh and the Ó Fearghuis Ailill Cruitire, 7th century King of Brega Ailill Medraige mac Indrechtaig (died 764), King of Connacht Ailill, 9th century Bishop of Clogher