Masha sits next to 4 phonetic neighbors — Sasha, Dasha, and Mia are the closest matches by sound. Most share Masha's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the sea, bitter"
"hope"
"victorious one"
"triumphant one"
"hope"
"of the Julian family"
"sun, moon (disputed)"
"each of the two"
"gracious, dear, beloved (Slavic root 'mil')"
"new grace, gracious new beginning"
"golden, made of gold"
"peace"
"wisdom"
"traditional flat sandal (object, not name meaning)"
"gift of God"
"purity, beauty, grace"
"the beloved, darling"
Similar sound: These names share phonetic patterns with Masha — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Maria origins, giving them the same cultural heritage as Masha.
Rhythm: Masha is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.