Keanu sits next to 3 phonetic neighbors — Kayano, Ciano, and Kiano are the closest matches by sound. Most share Keanu's Hawaiian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"cool breeze over the mountains"
"crow, dark bird"
"modern American creation"
"peace, complete"
"son of Jeffrey, son of God's peace"
"son of David"
"sun, like the sun"
"asked of God"
"God has given"
"red (hair color)"
"statement of belief, system of faith"
"garden, vineyard"
"substitute, replacement"
"nobleman, duke"
"father of height"
"gentle, loyal one"
"resolute protector's son"
"son of Egan, little fire"
"requested of God"
"divine inspiration, fury, frenzy"
"river"
Similar sound: These names share phonetic patterns with Keanu — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hawaiian origins, giving them the same cultural heritage as Keanu.
Rhythm: Keanu is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.