Faustina sits next to 3 phonetic neighbors — Justina, Celestina, and Christina are the closest matches by sound. Most share Faustina's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fortunate, auspicious"
"king"
"God is gracious"
"beloved, wished-for child (from Mary/Amara)"
"great queen, divine queen"
"free man, warrior"
"the majestic, the great one"
"lady, noblewoman"
"mine, my own (Mia) with grace suffix"
"flowering, in bloom"
"open grassland, treeless plain"
"gift from God"
"celestial, divine"
"bright, shining"
"olive tree"
"God has shown favor"
"small, humble"
"little saint"
Similar sound: These names share phonetic patterns with Faustina — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Faustina.
Rhythm: Faustina is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.