Holding steady.
Popularity of Fidelis since 1903
Babies named Fidelis per year in U.S. Social Security records. Raw births topped out in 1926, but relative to how few babies were recorded back then, Fidelis's real moment was 1904.
Data table (by decade)
| Decade | Girls | Boys |
|---|---|---|
| 1900s | 13 | 5 |
| 1910s | 31 | 24 |
| 1920s | 52 | 0 |
| 1930s | 13 | 0 |
| 1940s | 5 | 0 |
| 1950s | 0 | 0 |
| 1960s | 0 | 5 |
| 1970s | 0 | 0 |
| 1980s | 0 | 0 |
| 1990s | 0 | 0 |
| 2000s | 0 | 10 |
| 2010s | 0 | 5 |
| 2020s | 0 | 0 |
Meaning & origin
Fidelis is a Latin virtue name with deep historical roots. It first appeared in U.S. records in 1904, its peak year, and has remained in consistent but very low usage ever since, with a stable trajectory. As of 2025, it has not broken into the top 1000 rankings and is a rare choice. The name is strongly associated with Saint Fidelis of Sigmaringen and has been used by Catholic families, particularly in German-speaking regions. Its absence from top states lists highlights its rarity. Fidelis offers a distinctive alternative to more common virtue names like Faith or Felicity.
From Latin fidelis, meaning 'faithful, loyal'. It is a virtue name that was used by early Christians and has been borne by several saints, including Saint Fidelis of Sigmaringen, a Capuchin friar martyred in 1622. The name has seen occasional use in English-speaking countries, often in Catholic families.
Nicknames & variants
Nicknames: Fide, Fido, Delis
Variants: Fidelio
Sibling names for Fidelis
Names that share Fidelis's style, for a brother or sister.
