Eydan sits next to 4 phonetic neighbors — Aidan, Ethan, and Eden are the closest matches by sound. Most share Eydan's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little fire"
"ruler of supernatural beings"
"bright, splendid"
"impulsive, little king"
"high settlement or estate"
"Gomeric's hill"
"forest"
"from Airelle (Norman place name)"
"free man, warrior"
"quiet, calm, reserved"
"rock worker, craftsman"
"peace of the father"
"uncertain, possibly warrior spirit"
"dweller at the untilled ground"
"badger settlement"
"modern blend: bright house, highest point"
"little dark one"
"peaceful, tranquil"
"famous army, warrior people"
"lion-hearted, brave"
"a large inland body of water"
Similar sound: These names share phonetic patterns with Eydan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Eydan.
Rhythm: Eydan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.