Colm sits next to 4 phonetic neighbors — Callum, Colum, and Colin are the closest matches by sound. Most share Colm's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dove"
"fair, blessed"
"supplanter"
"fair warrior, white hero"
"dark-haired chieftain"
"descendant of the victorious one"
"from Erroll, Scotland"
"from the Afton river"
"fair, beautiful"
"the genuine article"
"handsome, gentle, kind"
"blessed, holy"
"bright-headed, strife"
"helmet of will, resolute protector"
"Rowan tree"
"descendant of the dark challenger"
"possession, acquired"
"bear of the gods"
Similar sound: These names share phonetic patterns with Colm — 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 Colm.
Rhythm: Colm is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.