aontamha
Definitions (by source)
-umha (often –ugha), i n-a 3 1, 27 22, 48 21, 60 9.
Aithdioghluim Dána: A Miscellany of Irish Bardic Poetry, Historical and Religious, including the Historical Poems of the Duanaire in the Yellow Book of Lecan. Vol II, Translations, Notes, Vocabulary. Editor: Lambert McKenna S.J.