Who is Mariamme from The Jewish War and what is their importance?

Mariamme was the name used by two of Herod's wives. He divorced his first wife Doris to marry Mariamme I, who was the daughter of Aristobulus' son Alexander. Mariamme I's grandfather, Hyrcanus II, was an heir to the throne, but he was accused of conspiracy and executed with her brother Jonathan. Mariamme I's five children included two girls and three boys of which one died and two were executed by Herod. She hated Herod for his role in killing her elder relatives.

Herod's third wife, Mariamme II, had a son who was also named Herod.