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)"
"to give thanks, thankfulness"
"you will always be loved"
"boomerang"
"strong, vigorous"
"weary"
"peace, completeness"
"maiden, girl"
"chalk wharf, chalk port"
"bright, cheerful"
"a narrow path or road"
"gentle horse"
"May meadow, spring clearing"
"God is my judge"
"protector, she who defends"
"victory, triumph (symbolic)"
"of the forest"
"precious gem"
"queen, wife of the khal (warlord)"
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.