Mako sits next to 4 phonetic neighbors — Mako, Marco, and Macko are the closest matches by sound. Most share Mako's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"true child; sincerity"
"victory of the people (via Nico)"
"good change, virtue through transformation"
"second child"
"child of the sea and wave"
"warrior of the sea"
"rest, comfort"
"heavenly strength"
"clear weather"
"who is like God?"
"breeze, air current"
"traditional masculine warrior name"
"chronicle, record"
Similar sound: These names share phonetic patterns with Mako — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Mako.
Rhythm: Mako is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.