Where does “Cassandraic” come from?

Cassandraic (English) comes from English Cassandra, from Ancient Greek Κασσάνδρα, from Ancient Greek Κάσσανδρος.

Cassandraic (English): prophesying doom

Definitions

Step	Language	Word	Meaning
1	English	Cassandra	A person who makes dire predictions, especially...
2	Ancient Greek	Κασσάνδρα	—
3	Ancient Greek	Κάσσανδρος	—

Cassandraic — Etymology, Origin & Word History | Etymology Explorer