Marietta sits next to 5 phonetic neighbors — Mariette, Harriet, and Mariela are the closest matches by sound. Most share Marietta's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"wished-for child, beloved"
"waterfall, lake meadow"
"coined melodious name"
"poetic, expressive of direct emotion (modern English sense)"
"unpredictable, rebellious outsider"
"of Athens, Athenian"
"beloved, dear"
"creative variant of Katalina"
"one who brings good luck"
"noble, of noble kind"
"rising sun"
"modern American coinage"
"queen"
"little beloved one"
"narrow strait"
"she who intoxicates, intoxicating one"
"joyful, playful one"
"modern invented name"
"of the sun, sun-related"
"miracle (if derived from Hebrew Nasia)"
Similar sound: These names share phonetic patterns with Marietta — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Latin origins, giving them the same cultural heritage as Marietta.
Rhythm: Marietta is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.