Fenwick sits next to 3 phonetic neighbors — Frederick, Fenix, and Derrick are the closest matches by sound. Most share Fenwick's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"farm by the fen"
"modern invented name, phonetic blend"
"tax collector, rent farmer"
"round, short person"
"divinely favored"
"initials: various combinations (Andrew Charles, Anthony Cole, etc.)"
"shining, pale"
"weapon, mace bearer"
"hawk-like; stately"
"dearly loved"
"chance, fate, the throw"
Similar sound: These names share phonetic patterns with Fenwick — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Fenwick.
Rhythm: Fenwick is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.