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"
"Thor's stone"
"good man"
"God is my help, help of God"
"river that swallows all rivers"
"increase, growth"
"seven; divine completion"
"son of the fair one"
"birth, nativity"
"possibly from a- (not) + treo (tremble)"
"shining glory"
"pure, without blemish"
"twin"
"fair warrior, white hero"
"elevated one"
"of Mount Carmel"
"lord, sun"
"settlement of the prince"
"gentle, loyal one"
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.