Rosi sits next to 3 phonetic neighbors — Rosie, Roxy, and Rosy are the closest matches by sound. Most share Rosi's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rose"
"bright one, radiant"
"the fulfilled, satisfied one (from Londisiwe)"
"related to the bow, bow-bearer"
"other, foreign, noble"
"manifestation of God"
"God is just; my witness. A feminine form of the Hebrew name Adlai, ..."
"Work-power; industrious leader"
"diamond, precious stone"
Similar sound: These names share phonetic patterns with Rosi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Rosi.
Rhythm: Rosi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.