Fitzwilliam
Boy name · Celtic Gaelic · English
Meaningson of William · Norman
- US rank
- #12,008
- Syllables
- 3
- Peak
- #7,502 in 2020
5 babies were named Fitzwilliam in the US in 2025. It has dropped 4,506 places in five years.
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US births per million boys, 2014–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Fitzwilliam you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 344,828 baby boys born in the US in 2025 was named Fitzwilliam, 5 babies in all. In a typical school of 500 kids, your Fitzwilliam would very likely be the only one.
- HistoryFitzwilliam first shows up in US birth records in 2014, the first year at least 5 babies got it. That makes it a fairly new name, younger than many of today's parents.
- Best yearIts best year was 2020, when it reached #7,502.
- New on the sceneFitzwilliam wasn't given to enough babies to be counted in 2000. It only took off after 2014.
- TrendFitzwilliam has slipped 4,506 places over the last five years and now sits at #12,008. Good news if you want a familiar name that fewer kids will share.
- MeaningIn Norman, Fitzwilliam means “son of William”. Our records link it to Celtic Gaelic and English roots.
About the name Fitzwilliam
Fitzwilliam is a boy name of Celtic Gaelic and English origin meaning “son of William”. It has 11 letters and 3 syllables, starting with F and ending in “-iam”. US birth records list Fitzwilliam for boys from 2014 to 2025, in 12 of those 12 years. Its best year was 2020, when it ranked #7,502 among boy names. In 2025 it ranked #12,008, with 5 babies.
Origin:Celtic Gaelic namesEnglish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 2010s | 4.7 | 214,286 boys |
| 2020s | 4.3 | 229,885 boys |
More Celtic Gaelic boy names
- Boy name: Bowen · son of Owen
- Boy name: Malcolm · devotee of Saint Columba
- Boy name: Danny · God is my judge
- Boy name: Calum · dove
- Unisex name: Bowie · yellow-haired
- Boy name: Cian · ancient
- Unisex name: Naveen · new
- Boy name: Earl · nobleman
Questions about the name Fitzwilliam
What does the name Fitzwilliam mean?
Fitzwilliam means “son of William” in Norman.
What is the origin of the name Fitzwilliam?
Fitzwilliam has Celtic Gaelic, English roots in our records. Other Celtic Gaelic names include Bowen, Malcolm, Danny.
Is Fitzwilliam a boy or girl name?
Fitzwilliam is a boy name.
How popular is the name Fitzwilliam?
Fitzwilliam ranked #12,008 for US boys in 2025, given to 5 babies. Its best year was 2020 (#7,502).