Defne sits next to 4 phonetic neighbors — Daphne, Dafne, and Delphi are the closest matches by sound. Most share Defne's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"laurel, bay tree"
"divine, of Zeus"
"divine wisdom, celestial intelligence"
"righteous conduct, impartiality"
"mermaid, siren"
"halo of moonlight"
"industrious, working, rival (via Germanic Amelia)"
"dawn, radiance"
"star, starry one"
"sapphire gemstone, beautiful"
"life, alive"
"short form of Nicholas/Nicola"
"lyric poem of love and longing"
"west wind, gentle breeze"
"boundary, limit"
"tranquility, serenity"
"oak tree"
"pure, holy, chaste"
"captivating beauty (traditional interpretation)"
"sky-colored, heavenly blue"
Similar sound: These names share phonetic patterns with Defne — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Turkish origins, giving them the same cultural heritage as Defne.
Rhythm: Defne is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.