Mckenzie sits next to 4 phonetic neighbors — Mackenzie, McKenna, and Kennedy are the closest matches by sound. Most share Mckenzie's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Coinneach, the fair one"
"beloved"
"divine messenger"
"born of fire"
"home ruler, estate ruler"
"champion, cloud"
"from Laurentum, the laurel city"
"murmuring rock, ambush rock"
"island of wild boars (alternative etymology)"
"unhappy, unlucky one"
"little hollow, low-lying meadow"
"young servant, page boy"
"purity, grace"
"from Massy, Normandy"
"lion, lion of God"
"lovable, deserving of love"
"fragrant vine"
"the flowing river"
"defender, helper"
"lion of God"
"orchid flower (Cattleya species)"
Similar sound: These names share phonetic patterns with Mckenzie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Mckenzie.
Rhythm: Mckenzie is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.