[2][3][4] The final -d in Donald is partly derived from a misinterpretation of the Gaelic pronunciation by English speakers, and partly associated with the spelling of similar-sounding Germanic names, such as Ronald.
A short form of Donald is Don, and pet forms of Donald include Donnie and Donny.
The feminine given name Donella is derived from Donald.
[1] Donald has cognates in other Celtic languages: Modern Irish Dónal (anglicised as Donal and Donall);[5] Scottish Gaelic Dòmhnall,[6] Domhnull[7] and Dòmhnull;[8] Welsh Dyfnwal and Cumbric Dumnagual.
[1] Domnall or Domhnall is the name of many ancient and medieval Gaelic kings and noblemen: