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.