Orianna sits next to 4 phonetic neighbors — Oriana, Arianna, and Aurora are the closest matches by sound. Most share Orianna's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gold, golden"
"modern creative coinage, possibly from Greek xanthos (golden) or Th..."
"bright pledge, noble guarantee"
"victorious, triumphant (via Jay)"
"coral"
"lion, lioness"
"palm tree, flowering plant"
"rose flower, beauty"
"industrious ruler"
"maiden of strength"
"strong in battle"
"belonging to the Lord"
"pertaining to the sun"
"fair companion"
"modern invented name with Scottish roots"
"raven"
"rose plus grace (compound name)"
"name (as in one who is named)"
"cliff edge, escarpment"
"spring vegetation, fresh growth"
"grace or favor (Ann component)"
Similar sound: These names share phonetic patterns with Orianna — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Orianna.
Rhythm: Orianna is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.