Raina sits next to 4 phonetic neighbors — Reina, Rayna, and Rena are the closest matches by sound. Most share Raina's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"queen"
"elf ruler, ruler of supernatural beings"
"hillside meadow"
"stone of the side"
"compassion, forgiveness, grace"
"from the city of Laurentum"
"joyful"
"possessor of goodness"
"one who gathers information, explorer"
"maiden, young girl"
"white, holy, blessed ring"
"descendant of Rian"
"daughter of the sea"
"clear, evident"
"dark-complexioned"
"son of Maud"
"defender of men"
"precious blue gemstone"
"gentle horse"
"vigilant in battle, watchful warrior"
"God is gracious"
Similar sound: These names share phonetic patterns with Raina — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic origins, giving them the same cultural heritage as Raina.
Rhythm: Raina is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.