DempseyIrish Anglicized form of Irish Ó Díomasaigh meaning "descendant of Díomasach", a given name meaning "proud".
DouglasScottish From the name of a town in Lanarkshire, itself named after a tributary of the River Clyde called the Douglas Water, derived from Gaelic dubh "dark" and glais "water, river" (an archaic word related to glas "grey, green"). This was a Scottish Lowland clan, the leaders of which were powerful earls in the medieval period.
DoyleIrish From the Irish Ó Dubhghaill, which means "descendant of Dubhghall". A famous bearer was Arthur Conan Doyle (1859-1930), the author of the Sherlock Holmes mystery stories.
LawrenceEnglish Derived from the given name Laurence 1. Famous bearers include revolutionary T. E. Lawrence (1888-1935) and author D. H. Lawrence (1885-1930).
MaloneIrish Anglicized form of Irish Ó Maoil Eoin meaning "descendant of a disciple of Saint John".
MannGerman, English From a nickname meaning "man". This may have originally been given in order to distinguish the bearer from a younger person with the same name.
Moon 2English Originally indicated a person from the town of Moyon in Normandy.