Updated June 9, 2019 Share: Boy name origins & meanings Irish : Mouth of the Roe River; wheelwright Boy name variations Monroe Monroe - 13% this year Neutral Uncommon Find out more Munro Munro - 17% this year Masculine Rare Find out more Monro Monro 0 % this year Masculine Rare Find out more Family name origins & meanings Scottish : variant of Monroe.In Ireland, Munroe has come to replace the surname Mulroy in some cases.