Cassiel sits next to 5 phonetic neighbors — Castiel, Gabriel, and Raphael are the closest matches by sound. Most share Cassiel's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"my covering is God; God protects"
"flint, thorn bush"
"home ruler"
"from the city of Troy"
"son of John"
"thin, lean"
"one who cuts, cutter of cloth or stone"
"mild, gentle"
"broad hill"
"noble bear"
"son of Ben"
"hunting grounds"
"noble's settlement"
"fort, castle"
"rye land, land of rye fields"
"my God is Yahweh"
"town of the lexicon"
"Yahweh is my God"
"place of the elms"
"Ireland, land of the west"
Similar sound: These names share phonetic patterns with Cassiel — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Cassiel.
Rhythm: Cassiel is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.