Modern coinage, a blend of Rhoda and Rhona. It is now often taken to be a Welsh name derived from rhon ‘pike, lance’ (as in Rhonwen;) + -da ‘good’, as in Glenda. The name is associated particularly with the American film actress Rhonda Fleming (b. 1923 as Marilyn Louis).
Irish: Anglicized form of Gaelic Mac Maghnuis, patronymic from a Gaelic form of the Scandinavian personal name Magnus. As an Irish name this is found chiefly in Roscommon and Fermanagh and is connected with the O’Connors or the Maguires; in Scotland it is connected with the Colquhouns.