Manu sits next to 4 phonetic neighbors — Mano, Manny, and Nano are the closest matches by sound. Most share Manu's Hawaiian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bird, free spirit"
"God has healed, healing of God"
"strong, powerful"
"renowned in battle"
"native podocarp tree"
"auspicious, blessed"
"one who climbs to great heights"
"God is gracious"
"universe, cosmos"
"who is like God? (rhetorical, meaning no one)"
"fingernail, claw"
"solitary monk, single house"
"the bull, the best, superiority"
"part of Shiva, divine fragment"
"healer"
"of the mountain, from the mountain"
"lion of man"
"bright, brilliant"
Similar sound: These names share phonetic patterns with Manu — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Maori/Polynesian origins, giving them the same cultural heritage as Manu.
Rhythm: Manu is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.