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)"
"peace, love (symbolic)"
"abundance"
"little king"
"pleasant meadow"
"beautiful, rare and precious"
"my God is Yahweh, the Lord is my God"
"safe, unharmed"
"lake (suffix)"
"pure, clean"
"lovely, fair"
"all, completely beautiful"
"born of fire"
"pure (via Kayla/Katherine association)"
"shining torch"
"reference to Our Lady of Ainhoa (the Virgin Mary)"
"strong, full-grown"
"new beginning"
"soft, tender, gentle"
"warrior woman (modern interpretation)"
"high meadow"
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.