Cashel sits next to 5 phonetic neighbors — Cash, Asher, and Castle are the closest matches by sound. Most share Cashel's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"stone ringfort, castle"
"acquired, craftsman (via Hebrew Cain/Kaine)"
"famous shouter, distinguished one"
"slender, narrow"
"hound, warrior"
"thunder"
"slender"
"raven (sacred Celtic bird)"
"one who struggles with God"
"my light, my flame"
"God is gracious"
"slender youth, young warrior"
"descendant of the gentle one"
"supreme, excellent"
"graceful warrior"
"pearl of wisdom"
"thin, lean"
"descendant of Braonán (moisture/sorrow)"
"from Arcy (place name)"
"Ireland, land of the west"
Similar sound: These names share phonetic patterns with Cashel — 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 Cashel.
Rhythm: Cashel is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.