Dolan sits next to 3 phonetic neighbors — Dylan, Nolan, and Dolan are the closest matches by sound. Most share Dolan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"descendant of the dark challenger"
"Son of Otto"
"Descendant of the cloud; son of Neil"
"God is gracious (via Juan/John)"
"claw, swift predator (via Talon)"
"gentle birth, beloved"
"Settlement near the well"
"Gaelic diminutive form of Ferdinand"
"beloved"
"possibly inspired by Zion, meaning monument or raised up"
"noble heir, royal successor"
"cause and effect, cosmic justice"
"maile vine (sacred Hawaiian plant)"
"modern blend of Waylon and Lynn"
"from the lake"
"modern invented name"
"creative elaboration of Quinton/Quentin"
"forest ranger, game warden"
"little one, shapely"
"supplanter, held by the heel"
Similar sound: These names share phonetic patterns with Dolan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Dolan.
Rhythm: Dolan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.