uaidh Definitions (by source) Show all Leabhar Branach: The Book of the O'Byrnes in phr. ar u., 1127 n. Leabhar Branach: The Book of the O'Byrnes. Editor: Seán Mac Airt. Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death from him, see ó Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Author: Geoffrey Keating. Editor: Osborn Bergin.