bonn Definitions (by source) Show all Poems on the O'Reillys a groat, something small. énbhonn d’iomarcaidh, a groat’s worth excess, 2246. The word is not common; Hessen gives references to two examples. Poems on the O'Reillys. Editor: James Carney. Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death m., sole of foot, 5757; ó bhaitheas go b., 4039; tógbhaid ar a bhonnaibh é, ‘they set him on his legs again,’ 3906 Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Author: Geoffrey Keating. Editor: Osborn Bergin.