Cass sits next to 4 phonetic neighbors — Cash, Cas, and Cassidy are the closest matches by sound. Most share Cass's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hollow, vain (from Latin Cassius)"
"one who does not speak, baby"
"ancient, enduring"
"forest meadow"
"cassia tree, cinnamon bark"
"the opposite of darkness"
"happy, fortunate, blessed"
"new house, bright abode"
"brave as a bear, bold bear"
"servant of God"
"He is my God"
"venerable, revered"
"God is gracious"
"to flow down, descend"
"invented modern name"
"victory of the people"
"may God protect"
"battle spirit"
"God is gracious"
"from the willow farm"
"God has helped"
Similar sound: These names share phonetic patterns with Cass — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Cass.
Rhythm: Cass is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.