Wellington sits next to 3 phonetic neighbors — Ellington, Pennington, and Harrington are the closest matches by sound. Most share Wellington's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the wealthy estate, prosperous settlement"
"short form of Bogoris (divine gift)"
"of the Marco family"
"Winda's homestead, windy village"
"dealer, trader"
"creative American original"
"writing tablet, fresh start"
"Welsh form of John"
"dark, coal-black"
"manly, warrior (from Andre component)"
"prince, royal heir"
"victory of the people"
"to care for, to cherish"
"bent grass clearing"
"crossroads, intersection"
"sword people, stone-knife people"
"remembered by Yahweh"
"knife maker"
"rock, stone"
"archway, structural arch"
"of Rudolf Diesel; fuel-powered engine"
Similar sound: These names share phonetic patterns with Wellington — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English 'Weola-ingtun' origins, giving them the same cultural heritage as Wellington.
Rhythm: Wellington is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.