Kenai sits next to 3 phonetic neighbors — Kenya, Kanye, and Kinnick are the closest matches by sound. Most share Kenai's Dena'ina Athabascan-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"flat land"
"father of light"
"warrior"
"strong warrior"
"wealth, fortune"
"panache, flair (as in 'cut a dash')"
"river, great water (from Zaire)"
"the bear"
"triumphant, victorious"
"youthful, young one"
"to follow a course, leave a mark"
"healer (via Jason/Iason)"
"may God protect"
"divinely appointed, called by God"
"short form of Benjamin: son of the right hand"
"he who holds firm the good"
"God is gracious"
"poet, bard"
"heart, mind settlement"
"wealthy guardian"
"from the River Clyde"
Similar sound: These names share phonetic patterns with Kenai — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Dena'ina Athabascan origins, giving them the same cultural heritage as Kenai.
Rhythm: Kenai is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.