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"
"Jehovah supports"
"safe, unharmed (proposed etymology)"
"priceless one, beyond praise"
"helmeted chief; armored head"
"high settlement or estate"
"Gomeric's hill"
"growth, abundance, increase"
"crown"
"coastal land, border land"
"god of war"
"the brave ones, the warriors"
"one who works with slate"
"stubborn one"
"of the Sabine people"
"son of Dubhagan (little dark one)"
"scarce, seldom"
"greatest stream (via Maxwell)"
"uncertain, possibly warrior spirit"
"from Airelle (a place in Normandy, France)"
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.