MallowbyNames

Fenrir

ᚠᛖᚾᚱᛁᚱFEN-reer · Of uncertain meaning; possibly 'dweller in the fens' or 'fen-dweller' from Old Norse fen.

2025 rank (boys)
#7,194
Babies named in 2025
11
Peak popularity
2023
2025 frequency
1 in 155,280 boys
Usually for
Boys
Trend
Rising since 2017

Rising since 2017, #7,194 for boys today.

Popularity of Fenrir since 2016

Babies named Fenrir per year in U.S. Social Security records.

713202020Most births 2023Boys
Data table (by decade)
DecadeBoys
2010s32
2020s93

Meaning & origin

Fenrir is an ancient mythological name that entered the U.S. naming pool only in 2016, reflecting a broader cultural interest in Norse mythology spurred by modern media. Despite its fearsome mythological associations, the name has been rising steadily in usage since 2017, reaching its peak rank of 7,194 in 2023. In 2025, it was given to approximately 1 in 155,280 boys, a figure that suggests niche but growing appeal. The name has not yet appeared in top state rankings, indicating its rarity across the country. Fenrir's adoption in the 2010s and 2020s mirrors the trend of using mythological and fantasy-inspired names. Its etymology is rooted in Old Norse, and while its exact meaning is debated, it is widely linked to the wolf Fenrir from Norse mythology, son of Loki. The name carries powerful, dark connotations but has been embraced by parents seeking a distinctive and strong-sounding name with literary and historical depth.

Fenrir is derived from Old Norse fen, meaning 'fen' or 'marsh,' and the suffix -rir, possibly 'dweller.' In Norse mythology, Fenrir is a monstrous wolf, a son of Loki, destined to kill Odin during Ragnarök. The name has seen modern use as a given name, particularly in Scandinavia and among enthusiasts of Norse mythology, since the early 21st century.

Nicknames & variants

Nicknames: Fen, Fenny

Variants: Fenris, Fenrisúlfr

Sibling names for Fenrir

Names that share Fenrir's style, for a brother or sister.

Sisters: Freya, Sigrid, Astrid, Ingrid, Saga

Brothers: Loki, Thor, Bjorn, Leif, Rune

A parent animal hugging its little one, the personalized name page

F is for Fenrir, our favorite little boy.

F is for Fenrir…”

In a Mallowby alphabet book, Fenrir's letter becomes Fenrir's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Fenrir's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Fenrir mean?
Fenrir likely means 'fen-dweller' from Old Norse fen, but its exact meaning is uncertain. It is the name of a monstrous wolf in Norse mythology.
How popular is the name Fenrir?
Fenrir is very rare. In 2025, it ranked 7,194th in the United States, with an estimated 1 in 155,280 boys receiving the name. Its peak popularity so far was in 2023.
Is Fenrir a boy or girl name?
Fenrir is predominantly a masculine name, reflecting its mythological origin as a male wolf.