The name Deidra is an Irish baby name. In Irish the meaning of the name Deidra is: Melancholy. Aolder name Deirdre. In Celtic legend Deirdre died of a broken heart.
From the older Gaelic form Derdriu, meaning unknown, possibly derived from a Celtic word meaning "woman". This was the name of a tragic character in Irish legend who died of a broken heart after Conchobhar, the king of Ulster, forced her to be his bride and killed her lover Naoise.
