Cassian sits next to 4 phonetic neighbors — Sebastian, Florian, and Cyprian are the closest matches by sound. Most share Cassian's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the Cassian family (Roman gens)"
"son of Ridge"
"candle maker or seller"
"Yahweh is merciful"
"asked for, prayed for"
"descendant of the sea warrior"
"born on Sunday"
"to tame, to subdue"
"young lion"
"God is salvation, Yahweh saves"
"untamed, wild-natured"
"greater, superior"
"ruler, sovereign (from Julius Caesar's name)"
"opportunity, happenstance"
"gracious, dear"
"gift of God, blessed one"
"from the city of Dax"
"charcoal, dark"
"lives near reeds"
"settlement near the coal"
Similar sound: These names share phonetic patterns with Cassian — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Cassian.
Rhythm: Cassian is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.