Edwyn sits next to 4 phonetic neighbors — Edwin, Edward, and Edmund are the closest matches by sound. Most share Edwyn's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"prosperous friend"
"from the ledge farm, shelf settlement"
"God has heard"
"natural, undomesticated"
"fragrant spice"
"elm grove"
"derived from Octavian"
"desiring peace, will and peace"
"Elf ruler; wise ruler (from Aelfric)"
"wheel maker, cartwright"
"settlement among the undergrowth, brushwood farm"
"from Sebastia"
"marked one"
"river"
"pledge or oath"
"great, venerable, magnificent"
"Yahweh has been gracious"
"from the settlement clearing"
"counsel, advice"
Similar sound: These names share phonetic patterns with Edwyn — 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 Edwyn.
Rhythm: Edwyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.