Nolan sits next to 3 phonetic neighbors — Dylan, Roland, and Dolan are the closest matches by sound. Most share Nolan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"champion, famous one"
"mountain of strength; exalted"
"cloth walker, one who treads cloth"
"God is gracious"
"hawk of the plain"
"healer"
"divine reward"
"to carry, to endure"
"little fire"
"God is gracious (via John, Jack)"
"God is my strength"
"grey home, gravelly homestead"
"ruler of the estate"
"Yahweh is gracious"
"sea"
"the healer (Iason)"
"victory of the people"
"one who lives near a lane"
"from the long ridge"
"wealthy"
"son of the valiant one"
Similar sound: These names share phonetic patterns with Nolan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish origins, giving them the same cultural heritage as Nolan.
Rhythm: Nolan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.