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).
English: of uncertain origin. Many hypotheses have been put forward as to its origin. The most plausible is that a habitational name from Essworthy (pronounced Essery locally), near Hatherleigh, Devon. Compare Ussery and Esworthy.