Quick answer
Deirdre is a girl name with Old Irish roots meaning "daughter".
Pronunciation: American English /ˈdɪɹ.dɹə/; American English /ˈdɪɹ.dɹi/; British English /ˈdɪə.dɹə/; British English /ˈdɪə.dɹi/; Irish /ˈdʲɛɾˠ.dʲɾʲə/.
Meaning and history
This name comes from the Old Irish name Derdriu, meaning unknown, possibly derived from der meaning "daughter". This was the name of a tragic character in Irish legend who died of a broken heart after Conchobar, 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).
Notes and context
Usage: english, irish, irish mythology