Ronald vs. Donald — What's the Difference?

Ronald is a masculine given name derived from the Old Norse Rögnvaldr, or possibly from Old English Regenweald. In some cases Ronald is an Anglicised form of the Gaelic Raghnall, a name likewise derived from Rögnvaldr.

Donald is a masculine given name derived from the Gaelic name Dòmhnall. This comes from the Proto-Celtic *Dumno-ualos ("world-ruler" or "world-wielder").