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"
"stoneworker, bricklayer"
"guide, wide"
"patrician, of noble birth"
"little battle"
"God has remembered"
"may God protect"
"healer"
"defender of men"
"little king"
"greatest"
"the herb sage"
"red earth, made from the ground"
"from the city of Milan"
"God is gracious"
"little fire"
"God has healed"
"son of Jack"
"always powerful"
"son of Madoc"
"adornment, goodness"
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.