Eiden sits next to 5 phonetic neighbors — Aiden, Eden, and Hayden are the closest matches by sound. Most share Eiden's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fire (from the sun god Aodh)"
"remembered by Yahweh"
"he who holds firm the good"
"made by God"
"narrow, a strait"
"defender of men"
"jet-black, swift"
"wolf"
"help, helper"
"land, territory"
"raven"
"sea warrior"
"son of Aodh (fire)"
"dealer in provisions and supplies"
"son of Judd"
"true, faithful, genuine"
"famous wolf"
"phonetic invention, modern American creation"
"wild goat (ibex)"
"watchful, vigilant (via Casey influence)"
"farm settlement of Dudda"
Similar sound: These names share phonetic patterns with Eiden — 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 Eiden.
Rhythm: Eiden is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.