Fidelis
Fidelis is a given name and surname. The equivalent is Fidélis in Portuguese or Fidel in Spanish.
- Ancient Roman
Meaning & Origin of Fidelis
What this name means, where it came from, and how it has traveled across cultures.
Fidelis is a given name and surname. The equivalent is Fidélis in Portuguese or Fidel in Spanish.
Source: Wikipedia (CC BY-SA 3.0). Read more →
Cultural Origins (via Behind the Name)
- Ancient Roman
The Story of Fidelis
As a girl name
Fidelis first appeared in U.S. Social Security Administration records as a girl name in 1904, with 7 babies given the name that year. The name hit its high-water mark in 1926: 11 births, good for #2,872 nationwide. The 1920s were its strongest decade, accounting for roughly 46% of all recorded Fideliss. Its most recent appearance in the national data came in 1941 (5 births); the name has since faded from the published rankings. In total, more than 114 Fideliss have been born in the U.S. since records began in 1880, spanning the 1900s through the 2020s.
As a boy name
The earliest SSA record of Fidelis as a boy name dates back to 1903, when 5 babies received it. 1917 was its biggest year on record, with 8 newborns named Fidelis — #2,956 in the national rankings. The 1910s were its strongest decade, accounting for roughly 49% of all recorded Fideliss. Its most recent appearance in the national data came in 2011 (5 births); the name has since faded from the published rankings. In total, more than 49 Fideliss have been born in the U.S. since records began in 1880, spanning the 1900s through the 2020s.
Popularity Over Time
Popularity by State
Names that sound like Fidelis
Phonetically similar names — useful when Fidelis is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.
- Fatalis
- Fetalis
- Foodless
- Fadeless
- Fidelio
- Fuddles
- Fedeli
- Federalists
- Fellas
- Fidelity
- Fatless
- Footless
Source: Datamuse . Phonetic similarity ranking, not curated.
Frequently Asked Questions about Fidelis
What does the name Fidelis mean?
What is the origin of the name Fidelis?
How popular is Fidelis in 2026?
When was Fidelis most popular?
Is Fidelis a unisex name?
What names go well with Fidelis?
About the name Fidelis
Fidelis is a unisex baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1904 and has accumulated 114 births in the dataset. Fidelis's peak popularity came in 1926 when it ranked #2,872. Use the chart and map above to compare Fidelis's trajectory across years and U.S. states, or browse the related names section to discover similar choices.
Continue exploring
- Top names of 1926 →
- Names of the 1920s →
- Names starting with "F" →
- Browse all girl names →
- Top names of 2026 →
- Browse unisex names →
Data sources
- Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
- Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
- Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
- Predicted nationality distribution — Nationalize.io .
- Phonetically similar names — Datamuse .
Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.