Rosa sits next to 4 phonetic neighbors — Rose, Rosie, and Rosalind are the closest matches by sound. Most share Rosa's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rose"
"salt worker, salt town"
"pure, holy"
"grey fortress, grey enclosure"
"child of the fair one"
"little king"
"pure"
"bright, shining"
"crown, garland"
"crown of laurels"
"peace (related to Ériu)"
"little"
"brave, courageous (lion-like)"
"brave, strong, manly"
"holy peace, blessed reconciliation"
"wise"
"gracious, merciful"
"God is my oath"
"pleasant meadow"
"pure (via Kayla/Katherine association)"
"little Robert"
Similar sound: These names share phonetic patterns with Rosa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Rosa.
Rhythm: Rosa is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.