Sétach, Gaelic-Irish feminine forename.
The name Sétach is attested in a single entry in the Annals of Ulster, under the year 1042, which records the death of:
At least two families bearing this surname are known. One was represented by Dub Sláine ua Lorcáin (d. 1004), abbot of Emly, who was probably first cousin of Brian Boru. A second were kings of Fothairt in Chairn aka Fothart Tíre, in the Barony of Forth, County Wexford.
References
Sétach Wikipedia(Text) CC BY-SA