Meaning Commonly most known as a last name, it is of Celtic origin and means 'son of Gerald'. Origin of Fitzgerald Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Thomas, Edward, George, Robert Pronunciation 🔊 Listen Fitzgerald Similar Names Sullivan Fitz Gerald Powell Kodi Finlay Cody Denzil Gearald Aeron Codie Year by Year Popularity of Fitzgerald