Sirena sits next to 4 phonetic neighbors — Serena, Sarena, and Marina are the closest matches by sound. Most share Sirena's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mermaid, siren"
"bandage, bond (Greek etymology)"
"beautiful, lovely"
"noble, of noble kind (via Elizabeth)"
"city of mosaics"
"pure, holy, chaste"
"blooming, flowering"
"lapis lazuli, sky blue stone"
"bright, clear, luminous"
"little rose"
"gentle meadow"
"peaceful sky"
"of Lavinium, Roman city"
"honey"
"supplanter, one who follows at the heel"
"of the Jordan River"
"golden"
"of Magdala (lake district)"
"peace, wisdom"
Similar sound: These names share phonetic patterns with Sirena — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Spanish/Italian origins, giving them the same cultural heritage as Sirena.
Rhythm: Sirena is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.