Fitzwilliam
Meaning
"son of William"
Origin: Anglo-Norman
Cultural Roots
Quick Stats
- Popularity Rank
- #24,472
- Total SSA Count
- 6
- Syllables
- 4
- Formality
- Formal
- Nicknames
- Fitz, Will, Wills
Baby Name Comparison — 2026
"son of William"
Origin: Anglo-Norman
"divine gift"
Origin: Greek
Theodore is more popular, ranked #4 vs #24472 for Fitzwilliam.
Historical US popularity rank — lower number means more popular.
Historical trend data not available for this comparison.
Names that pair well as siblings.
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Theodore is more popular, ranked #4 compared to Fitzwilliam at #24472 in the United States.
Fitzwilliam means "son of William" (Anglo-Norman origin). Theodore means "divine gift" (Greek origin).
Fitzwilliam is primarily a boy name. Theodore is primarily a boy name.