Neil sits next to 4 phonetic neighbors — Neal, Niall, and Neel are the closest matches by sound. Most share Neil's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"cloud"
"victory of the people"
"light, luminous"
"raven"
"bounty, kindly, beloved"
"vigor and power"
"ruler of the people"
"God supports, Yahweh supports"
"king"
"raven-like, dark as a raven"
"laughter"
"victorious, crowned one"
"little cloak, beloved"
"son of Cole"
"jet-black, swift"
"descendant of Braonán, tearful one"
"from the fen, marshland dweller"
"admirable, worthy"
"one who cuts cloth, tailor"
"from Amiens (France)"
Similar sound: These names share phonetic patterns with Neil — 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 Neil.
Rhythm: Neil is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.