Masa sits next to 2 phonetic neighbors — Maya and Maza are the closest matches by sound. Most share Masa's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"justice, correctness"
"heroic, beautiful (legendary)"
"cherry tree flower"
"beautiful second"
"pleasantness, sweetness"
"carp fish; symbol of perseverance and good luck"
"bright, clear, famous (Italian root)"
"sword"
"temple, shrine"
"rapids, flowing water"
"dream and beauty"
"early life, beautiful weaving"
"lapis lazuli, apple"
Similar sound: These names share phonetic patterns with Masa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Masa.
Rhythm: Masa is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.