Deidra Is A Girls Name Of Irish Origin, Meaning "broken-hearted Or Sorrowful." But Dont Let This Melancholic Meaning Put You Off, For The Name Deidra Is Rich In Gaelic History And Mythology. Deirdre, From Which The Name Deidra Derives, Was The Heroine Of The Fate Of The Sons Of Usnach. Though Deirdres Story Ended Tragically, She Was A Much Loved Beauty As The Legend Goes. Deidra Is An Elegant Name And Ideal For Fans Of Irish Culture And Gaelic Myth.