FitzThomas
The name FitzThomas or Fitzthomas may refer to one of the following:
- Piers FitzThomas Butler of Duiske, illegitimate son of Thomas Butler, 10th Earl of Ormond.
- James FitzThomas FitzGerald, the Súgán Earl of Desmond and eldest son of Sir Thomas Fitzgerald, commonly called "Thomas Roe," "Tomás Ruadh" or "Red Thomas"
- John FitzThomas FitzGerald, 1st Earl of Kildare,, Irish nobleman in the Peerage of Ireland, as 4th Lord of Offaly from 1287 and subsequently as 1st Earl of Kildare from 1316
- John FitzThomas FitzGerald, 1st Baron Desmond, grandson of Maurice FitzGerald, Lord of Lanstephan
- Maurice FitzThomas FitzGerald, 1st Earl of Desmond, Irish nobleman in the Peerage of Ireland, Captain of Desmond Castle in Kinsale, so-called ruler of Munster, and for a short time Lord Justice of Ireland
- Maurice FitzThomas FitzGerald, 4th Earl of Kildare, prominent Irish nobleman in the Peerage of Ireland and Lord Justice of Ireland
- Hugo [Hawksley Fitzthomas Summerson], British Conservative politician.