Keiran sits next to 5 phonetic neighbors — Kieran, Kiran, and Caelan are the closest matches by sound. Most share Keiran's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dark one, little dark one"
"to descend"
"joined, attached"
"dear, beloved"
"ordained minister's helper"
"from the craggy hills, little hill"
"land near the court"
"running (speed)"
"from the stone settlement"
"spiritual wisdom"
"saddlemaker, one from the homestead"
"woodland clearing"
"shield wolf"
"Elf ruler; wise ruler (from Aelfric)"
"may God smile"
"counsel wolf"
"old friend, wise friend"
"sand hill, sandy mound"
"white, fair-haired"
"from the rocky settlement"
"craftsman, smith"
Similar sound: These names share phonetic patterns with Keiran — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Keiran.
Rhythm: Keiran is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.