Fidelis
/F-V-D-V-L-V-S/
Faithful — Fidelis is the Latin word for fidelity itself, an adjectival name carrying clear classical weight. The motto "Semper Fidelis" of the US Marine Corps comes from the same root.
Get Fidelis's full report — patron saint, feast day & a portrait — freeQuick — what every Christian parent asks about Fidelis:
How well does Fidelis fit your family?
This page tells you what Fidelis means. The app tells you whether it's right for your baby — scored against your family & your heritage, and your baby's birth details.
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Six signals — scored for your family & heritage, not in the abstract:
Meaning & origin
Yes — Fidelis is a Christian boy name of Latin origin, meaning “Faithful — Fidelis is the Latin word for fidelity itself, an adjectival name carrying clear classical weight. The motto "Semper Fidelis" of the US Marine Corps comes from the same root.”.
Fidelis is a boy's name of Latin origin, traditionally used in Christian families. The name means "Faithful — Fidelis is the Latin word for fidelity itself, an adjectival name carrying clear classical weight. The motto "Semper Fidelis" of the US Marine Corps comes from the same root." and belongs to the Divine cluster — names rooted in sacred meaning and spiritual tradition.
Common among German, Italian, European families, Fidelis carries cultural weight that goes beyond its dictionary definition — it's a name with a story and a community.
The patron saint & feast day behind Fidelis
Many Christian names carry a patron saint and a feast day (name day) — a tradition of choosing a name for the saint a child is born near, or one the family holds dear. Fidelis lives in this tradition of meaning and heritage.
NameRoot connects the dots. See Fidelis's patron saint, its feast day, and whether it aligns with your baby's birth — alongside its full family score.
See Fidelis's saint & feast day →What does Fidelis's numerology say?
Numerology assigns each name a single-digit destiny number by summing its letter values. Different schools use different mappings — NameRoot computes both so you can see how Fidelis resonates in either tradition.
Fidelis's destiny number is 1 — but a number only matters in context. The app matches it to your family's own numbers for a real compatibility read. See Fidelis's full reading →
Does Fidelis go with your family's names?
Fidelis breaks into 7 sounds: /F-V-D-V-L-V-S/. The real test isn't how it sounds alone — it's how it sounds beside the names already in your family: yours, your partner's, and any brothers or sisters. NameRoot scores that harmony, so Fidelis sits naturally next to a Mum and Dad like Michael & Anna, or a big sister named Gianna — no awkward clashes, no two names that blur together. Hear Fidelis beside your family's names →
Nicknames
Common affectionate forms of Fidelis — useful for everyday family conversation, early childhood, or as standalone given names themselves.
Variants across cultures
Fidelis appears in different forms across languages and traditions. Each variant carries the same root meaning with a distinct sound and spelling shaped by local phonology.
Names similar to Fidelis
If Fidelis resonates with you, these names live in the same world — drawn from the same tradition, sharing the same meaning, or echoing a similar sound.
From the same tradition
Other Christian boy names, common in German families
Sharing the same meaning
Other Christian boy names from the Divine cluster
Names that sound similar
Christian boy names that open with the same syllables as Fidelis
Explore more names
Keep exploring names like Fidelis — by tradition, by meaning, or by first letter.
Common questions about Fidelis
What does the name Fidelis mean?
Fidelis means "Faithful — Fidelis is the Latin word for fidelity itself, an adjectival name carrying clear classical weight. The motto "Semper Fidelis" of the US Marine Corps comes from the same root.." It is a boy name of Latin origin, traditionally used in Christian families.
Is Fidelis a boy or girl name?
Fidelis is most commonly used as a boy name.
What is the origin of the name Fidelis?
Fidelis is of Latin origin, used in Christian tradition, commonly among German, Italian, European families.
Is Fidelis a Christian name?
Yes. Fidelis is a boy name traditionally used in Christian families, of Latin origin.
What does Fidelis mean in Latin?
Fidelis originates from Latin, where it means "Faithful — Fidelis is the Latin word for fidelity itself, an adjectival name carrying clear classical weight. The motto "Semper Fidelis" of the US Marine Corps comes from the same root.."
What are common nicknames for Fidelis?
Common short forms of Fidelis include Fed, Del.
What is the numerology of Fidelis?
Fidelis has a Pythagorean destiny number of 1 — leadership and pioneering spirit.
When is Fidelis's feast day?
Fidelis's feast day — its traditional Christian name day — is April 24.
See how Fidelis scores for your family
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