Of Irish origin.

An Anglicization of Gaelic “Deas-Mhumhna”, meaning South Munster.

It was used as a surname that indicated a person who came from that province.

Famous bearers are Desmond Tutu, Desmond Dekker, Desmond Harrington, Desmond Elliot, Desmond Child, Desmond Llewelyn, Desmond Askew, Desmond Trufant.