Jacinda sits next to 3 phonetic neighbors — Lucinda, Belinda, and Jacinta are the closest matches by sound. Most share Jacinda's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hyacinth flower"
"star"
"to float, calm water"
"bright, clear, famous"
"noble kind, of noble birth"
"delicate, weak"
"curly-haired"
"lily flower (purity, beauty)"
"she of the lake"
"princess"
"lyre, musical instrument"
"fertile refuge in a desert"
"beloved + noble"
"free person, one from France (Frenchman)"
"To value, to esteem"
"bright, radiant"
"clearing belonging to Ann"
"fame, glory"
"friend, beloved"
"sun, sunshine"
"name of God"
Similar sound: These names share phonetic patterns with Jacinda — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek Hyakinthos origins, giving them the same cultural heritage as Jacinda.
Rhythm: Jacinda is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.