Keir sits next to 5 phonetic neighbors — Kier, Kiir, and Ciarán are the closest matches by sound. Most share Keir's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dark one, dark-complexioned"
"sharp, intelligent"
"brave traveler"
"Shade or darkness cast by an object blocking light"
"modern invented name"
"son of the renowned ruler"
"Craftsman; skilled tradesperson"
"westward, to the west"
"bought land, purchased territory"
"dove"
"wolf cub"
"symbol of wisdom and knowledge"
"from Renton, town name"
"God is gracious"
"great tide, sea current"
"little king, kingly"
"hawk, falcon"
"from the Afton river"
"of the elm tree, smooth stream"
Similar sound: These names share phonetic patterns with Keir — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic ciar origins, giving them the same cultural heritage as Keir.
Rhythm: Keir is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.