coirthe Definitions (by source) Show all Leabhar Branach: The Book of the O'Byrnes npl., in neamhchoirthe, 7092 n. Leabhar Branach: The Book of the O'Byrnes. Editor: Seán Mac Airt. Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death see coir Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Author: Geoffrey Keating. Editor: Osborn Bergin.