dé, dia
Definitions (by source)
(before names of days), stressed word and may be in pl. na diaa, dée, Céadaoine, etc. 24 P 8 209.
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.