Keo sits next to 3 phonetic neighbors — Kai, Koa, and Leo are the closest matches by sound. Most share Keo's Hawaiian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the wind, breath of life"
"grace, elegance"
"modern invented form of Jackson"
"bright valley"
"dark or fair (dual origin)"
"slender, narrow (from Irish Caolan)"
"red-haired, ruddy complexion"
"son of Hugh"
"sword/fire (brand element)"
"hope, aspiration"
"enclosed woodland"
"powerful ruler; God is gracious"
"chief hero"
"Beorhtsige's town"
"cloud"
"settlement by the brushwood"
"powerful (by association with the watt unit)"
"supplanter, held by the heel"
"from Hadria, dark and rich"
"invented modern name"
"high prominence, brow"
Similar sound: These names share phonetic patterns with Keo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hawaiian origins, giving them the same cultural heritage as Keo.
Rhythm: Keo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.