Eithan sits next to 3 phonetic neighbors — Ethan, Nathan, and Aidan are the closest matches by sound. Most share Eithan's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"strong, firm, enduring"
"cloth walker; fuller of cloth"
"occupational name for an archer or bowman"
"God is gracious"
"broom-covered hill"
"strong lord, powerful chief"
"son of James"
"Beauty, grace"
"merciful, gentle"
"warrior, brave one"
"son of Aeson, the hero who sought the Golden Fleece"
"mounted warrior, horseman"
"upright, fair"
"settlement of the raven's people; raven-town"
"divine messenger"
"warrior, strong man"
"keeper of the park, park ranger"
"divine smith, master craftsman"
"God with humanity"
"brave in battle"
"gentle, beloved"
Similar sound: These names share phonetic patterns with Eithan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Eithan.
Rhythm: Eithan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.