Sinda sits next to 5 phonetic neighbors — Cindy, Linda, and Sinead are the closest matches by sound. Most share Sinda's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"luminous, shining (via Lucinda)"
"shepherd, friend"
"the white, noble one"
"wonderful, to be admired"
"horn, strength"
"variant of Chloris, goddess of flowers"
"bright, famous"
"Grace"
"to soothe, to comfort"
"settlement of the Britons"
"lame, limping"
"from Leicester; possibly heavenly"
"numbness, the narcissus plant"
"shining, celestial light"
"of Rome, Roman woman"
"washed, cleansed; or variant of Lavinia"
Similar sound: These names share phonetic patterns with Sinda — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin lucidus origins, giving them the same cultural heritage as Sinda.
Rhythm: Sinda is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.