The Blood of Dragons specific information for this house is under construction. However, if you scroll down, you will find the family tree for this house.
Jossart Vaith (b. 138), Lord of the Red Dunes, formerly a hostage at the Red Keep,
his siblings:
Ser Galen (b. 140),
Cassella (b. 142), formerly a hostage at the Red Keep, formerly mistress to Prince Aegon Targaryen, mother to two illegitimate children left behind at King's Landing and much distraught,
Danelle (b. 145),
Sebaston (b. 150),
his bastard half-brother, Ser Jarvis Sand (b. 135), called the Bastard of the Red Dunes, m. Eloise Dalt (b. 138),
his father, {Lord Serion} (b. 120), Lord of the Red Dunes, a rebel against King Daeron I, killed by Qorgyle men-at-arms (d. 158),
his widowed mother, Lady Kerenza of House Uller (b. 120),