Save Type Region Usage Irish Meaning & HistoryExpand Links From Irish deas "south" and Mumhain. This was the name of a medieval kingdom in southern Ireland, created when the kingdom of Munster was partitioned. It is Anglicized as Desmond. Related NamesFamily Tree·Details Rootsdess + MumhainVariantDeasumhainOther Languages & CulturesDesmond(English) Given Name DescendantsDeasún, Desmond(Irish) Surname DescendantsDesmond, Ó Deasmhumhnaigh(Irish)