Finnegan sits next to 4 phonetic neighbors — Finn, Finley, and Flanagan are the closest matches by sound. Most share Finnegan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of the fair one"
"victory of the people (from Nicholas)"
"Beauty, grace"
"son of the young warrior"
"good man"
"generous, noble, honorable"
"God has heard (via Jaden influence)"
"noble, high"
"people's victory"
"young lion"
"tortoise (alternative Japanese reading)"
"of the Julian clan, youthful"
"money box, treasury"
"lotus flower"
"divine, god-like"
"opportunity, happenstance"
"strong man, warrior"
"renowned in battle"
"defender of men"
"phonetic American invention"
Similar sound: These names share phonetic patterns with Finnegan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Finnegan.
Rhythm: Finnegan is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.