Fidelis
- US rank
- Unranked
- Syllables
- 3
- Peak
- #1,130 in 1903
0 babies were named Fidelis in the US in 2025.
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US births per million boys, 1903–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Fidelis you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryFidelis first shows up in US birth records in 1903, the first year at least 5 babies got it. It has been in use for 122 years since.
- Best yearIts best year was 1903, when it reached #1,130.
About the name Fidelis
Fidelis is a boy name of Latin origin. It has 7 letters and 3 syllables, starting with F and ending in “-lis”. US birth records list Fidelis for boys from 1903 to 2011, in 9 of those 109 years. Its best year was 1903, when it ranked #1,130 among boy names. It hasn't been given to 5 or more US babies in a year since 2011, so today it's a genuinely rare choice.
Origin:Latin names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1900s | 6.0 | 167,064 boys |
| 1910s | 2.8 | 357,143 boys |
| 1960s | 0.2 | 4,166,667 boys |
| 2000s | 0.5 | 1,960,784 boys |
| 2010s | 1.3 | 769,231 boys |
More Latin boy names
- Boy name: Oliver · olive tree
- Boy name: Theodore · gift of God
- Boy name: Lucas · man from Lucania
- Unisex name: Elias · my God is Yahweh
- Unisex name: Luca · man from Lucania
- Boy name: Sebastian · venerable
- Boy name: Leo · lion
- Boy name: Alexander · defender of men
Questions about the name Fidelis
What is the origin of the name Fidelis?
Fidelis has Latin roots in our records. Other Latin names include Oliver, Theodore, Lucas.
Is Fidelis a boy or girl name?
Fidelis is a boy name.
How popular is the name Fidelis?
Fidelis is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2011. It peaked at #1,130 in 1903.