Given name & surname
Fitzwilliam
“the son of William”
Fitzwilliam is used as a given name and a surname. One English interpretation is “the son of William.”
Meaning & origin
What it means
One English interpretation is “the son of William.”
Where it comes from
An origin associated with this spelling is English.
The story
Published U.S. birth records include this spelling as early as 2014. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
Fitzwilliam through the years
- Babies since 1880
- 97
- 97 boys · 0 girls
- Most popular year
- 2017
- 10 babies
- 2025
- 5
- #12,636 for boys
- 2021–25 vs 2016–20
- −27%
- Easing
By the numbers
In 2025, this name appeared in 5 U.S. birth records for boys, ranking No. 12,636 among boys’ names. Average annual use for boys was 27.1% lower in 2021–2025 than in 2016–2020. Published U.S. population figures for this spelling include 274 as a surname in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Fitzwilliam’s family of names
Fitzwilliam has a related form in Fytzwilliam.
The ring: nicknames and forms.
Nicknames & forms 1
Diminutives, pet forms, short forms and variants used alongside the name.
Appears in
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