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"
"strong and courageous"
"descendant of the sea warrior"
"son of James"
"whole, universal, powerful"
"panache, flair (as in 'cut a dash')"
"free man"
"hollow, ravine"
"lasting impact, heritage"
"to rejoice, joyful"
"watchful"
"from the rye field"
"speed of God"
"roof maker"
"strength of God"
"battle chieftain (Cerdic interpretation)"
"manly, brave, strong"
"of the Julian family"
"dealer in provisions and supplies"
"interpreter, studious one"
"lord, sun"
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.