Deirdre

From the older Gaelic form Derdriu, meaning unknown, possibly derived from Old Irish der meaning "daughter". 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.

It has only been commonly used as a given name since the 20th century, influenced by two plays featuring the character: William Butler Yeats' Deirdre (1907) and J. M. Synge's Deirdre of the Sorrows (1910).