Lyndie sits next to 3 phonetic neighbors — Lindy, Wendy, and Cindy are the closest matches by sound. Most share Lyndie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"tender, gentle (like the linden tree)"
"bringer of light"
"faithful, devoted"
"rye clearing, meadow"
"noble, of noble birth"
"woodland clearing with hares"
"free woman"
"spear ruler"
"personal magnetism, compelling charm"
"princess, lady"
"pearl"
"exaltation (Selah)"
"modern invented name"
"son of Carr, marsh dweller"
"ascending, rising"
"member of the Gauts tribe"
"bright, radiant flower"
"heavenly oak, celestial light"
"creative American formation, possibly from Tatiana (arranger)"
"invented modern name from Bray + lin elements"
"fairy, enchanted being"
Similar sound: These names share phonetic patterns with Lyndie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German lindi/linde origins, giving them the same cultural heritage as Lyndie.
Rhythm: Lyndie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.