Fenrir sits next to 4 phonetic neighbors — Fenris, Fenwick, and Bjorn are the closest matches by sound. Most share Fenrir's Germanic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fen dweller, marsh wolf"
"shield-wolf"
"from, of (noble origin)"
"ruler of the people"
"triangular wall end, architectural peak"
"yew warrior"
"spear wielder, warrior ruler"
"ruler of the people"
"noble friend"
"experienced in rule"
"fortunate king"
Similar sound: These names share phonetic patterns with Fenrir — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Fenrir.
Rhythm: Fenrir is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.