Ulaidh
Definitions (by source)
pl., gen. Uladh, dat. Ultaibh, the Ultonians or Ulidians and their territory of Ulster, 2, 3, 4, &c. After the conquests of the Oirghialla (cf. p. 27) confined to Antrim, Down and part of Louth, 55, 57, 58.
Stories from Keating's History of Ireland. Editor: Osborn Bergin.