The surname Fitz or Fitts comes from the Norman French or Anglo-French prefix "Fiz" or "Fitz". It came from the Latin word, "Filius", and the modern French word "fils", meaning son.
In general the prefix "Fitz" is used with many names today: Fitzroy, Fitzgerald, Fitzwilliam and Fitzpatrick. This way the name would be refferring to the son of Roy, Gerald, William and Patrick.
In some cases it would refer to an illegitimate son such as FitzRosy (Duke of Grafton) who were dwscendants of Robert FitzRoy, an illegitimate son of King Henry I of England. Most surnames with prefix Fitz did not mean illegitimacy - or royal blood line.
Modern names end with son now such as John Robertson, Steven Richardson and Sven Ericson. This being example John son of Robert. The next generation would not have the same last name but instead would be Johnson, Stevenson and Ericson. A good exzmple of this is the famous explorer, a son of Eric the Red, Called Leif Ericson.
There are several variations to the spelling such as Fitz, Fitts, Fitt, Fytz, Fytze, Fittz, Futts, Feats, and Vize. Also another surname that should be looked at when researching Fitz and Fitts is Fitch.
Brady Fitts