Deirdre is a feminine given name of Celtic origin and of unknown meaning.

Deirdre is the name of a tragic heroine of Irish mythology.

More attention was drawn to the name during the early 20th Century in Ireland and throughout the Anglosphere after W. B. Yeats published his poem Deirdre in 1907 and playwright J.M.

There are a number of spelling variants and pronunciations of the name in use.

It was at its most popular between 1960 and 1972, when it was among the top 500 names for American girls.