58%RatingSave Gender Masculine Usage Irish, Scottish Meaning & History Gaelic byname meaning "red", often a nickname for one with red hair. This was the nickname of the Scottish outlaw Raibeart Ruadh MacGregor (1671-1734), known as Rob Roy in English. Related NamesFamily Tree·Details VariantRoy(Scottish) DiminutiveRuadhán(Irish) Other Languages & CulturesRoy(Dutch) Roy(English) Surname DescendantsOrman, Ormond, Ormonde, Ó Ruaidh(Irish) Categories colors, history, red Entry added March 18, 2010 ·