Dillon sits next to 4 phonetic neighbors — Dylan, Dillan, and Dylon are the closest matches by sound. Most share Dillon's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"great tide, son of the sea"
"help, helper"
"wealthy guardian, guardian of fortune"
"silver"
"faithful, devoted"
"high place, elevated land"
"meditation, absorption"
"vigor and power"
"little church"
"son of James"
"fifth"
"prince, chieftain"
"ruler, sovereign (from Julius Caesar's name)"
"remedy, cure (folk etymology)"
"laughter"
"land of lochs, land of fjords"
"leader, commander (variant interpretation)"
"glory of the land"
"renowned warrior"
"he who holds firm the good"
"valley, dell"
Similar sound: These names share phonetic patterns with Dillon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Dillon.
Rhythm: Dillon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.