Cassandra Thann

Lady Cassandra Thann is the daughter of Zelphar Arunsun. Zelphar came to Waterdeep with a young daughter in tow and eventually met and marries Lhestyn. The indomitable, intellectual matriarch of the Thann clan was almost single-handedly responsible for resurrecting the family's fortunes.

Family
Cassandra has nine children - Dertek, Eldaun, Randor, Zelphar, Harmon, Ildaera, Synthea, Danilo and Judith - and thirteen grandchildren.

Khelben "Ravencloak" Arunsun is her younger brother.