Aydin sits next to 3 phonetic neighbors — Aiden, Ayden, and Adin are the closest matches by sound. Most share Aydin's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"enlightened, bright, intelligent"
"certificate of authenticity"
"God will hear, heard by God"
"sword"
"wise, judicious"
"jewel, gem"
"resolute, strong-willed"
"lion, brave warrior"
"O human (traditional interpretation)"
"exalted, lofty"
"merciful, compassionate"
"grace, beauty, ornament"
"morning star, night visitor"
"moonlight, of the moon"
"God has heard (via Samuel)"
"blessed, fortunate"
"my God is Yahweh"
"lush, well-watered, abundant"
"friendliness, sociability"
Similar sound: These names share phonetic patterns with Aydin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Turkish origins, giving them the same cultural heritage as Aydin.
Rhythm: Aydin is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.