Adyn sits next to 4 phonetic neighbors — Aidan, Aden, and Ayden are the closest matches by sound. Most share Adyn's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little fire, born of fire"
"spring of water, water gift"
"sea and land"
"dream, prophetic sight"
"son of Daw (David), beloved son"
"plant that grows in moist places"
"command of Aku"
"valley settlement"
"narrow strait, channel"
"invented modern variant"
"trail left in water"
"gift of God (via Carmelo root)"
"valley, dell, low-lying area"
"son of Agnes (pure, holy)"
"swift as a deer"
"distinguished ruler"
"wise protector, counselor-guardian"
"holder of the heel"
"clearing in the forest"
"modern American invented name"
"of Mars, warlike"
Similar sound: These names share phonetic patterns with Adyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish origins, giving them the same cultural heritage as Adyn.
Rhythm: Adyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.