Eterscél mac Máele Umai (d. 721)[1] was a king of Munster from the Eóganacht Áine branch of the Eóganachta.
He was the grandson of Cúán mac Amalgado (d. 641), a previous king.
[2] There is confusion in the sources between his reign and that of Ailill mac Cathail Con-cen-máthair (d. 701).
Also, in the list of signatories to the signing of Adomnán's Law of the Innocents at Birr, County Offaly in 697; Eterscel is named king of Munster.
[4] According to a genealogical tract, Etarscel had a brother Uisneach who was heir apparent to the Munster throne until slain by his brother through envy and hatred and then Etarscel assumed the kingship of Munster[5] He abdicated around 702[6] after ruling for 6 years.