Marianna sits next to 5 phonetic neighbors — Mariana, Marianne, and Arianna are the closest matches by sound. Most share Marianna's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"grace and drop of the sea (Maria + Anna)"
"high, lofty, exalted"
"life"
"bird-like, relating to birds"
"noble kind, noble nature"
"born on Christmas Day"
"new, fresh, pure"
"youthful, downy-bearded"
"to strive, to rival, to excel"
"from the town of Lassy in Normandy"
"high meadow"
"sweet, pleasant"
"traveler from a foreign land"
"hope"
"of royal status, kingly lineage"
"from Beverley (Yorkshire place name)"
"consecrated, honored"
"defender of mankind"
"to be of worth, to be strong"
"sky, heaven"
"son of the marsh dwellers"
Similar sound: These names share phonetic patterns with Marianna — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin/Hebrew compound origins, giving them the same cultural heritage as Marianna.
Rhythm: Marianna is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.