Eastyn sits next to 3 phonetic neighbors — Easton, Eastin, and Austin are the closest matches by sound. Most share Eastyn's Old English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"eastern town"
"descendant of the hound of valor"
"the wild cat"
"son of Hudde (son of Hugh)"
"modern invented name"
"enduring, steadfast (via Dante)"
"rock, harbor"
"noble, warrior, of high birth"
"modern invented name"
"modern invented name in the -ayden tradition"
"champion (Irish-inspired)"
"praised by God (theophoric construction)"
"bard, poet (from Irish Daimhin)"
"of the people (from Germanic Deutsch)"
"tail, conclusion"
"iron"
"man of law, lawyer"
"of Mars, warlike"
"poet, bard"
"third son"
"Greece, land of wine"
Similar sound: These names share phonetic patterns with Eastyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Eastyn.
Rhythm: Eastyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.