Boudicca's Daughters

Tacitus and other Roman sources report that Queen Boudicca of the Iceni had two daughters, yet no source records the name of either daughter. It is generally agreed that their rape by Roman soldiers was one of the events that spurred the Iceni people into open revolt. Popular tradition has the daughters accompanied their mother into battle and dying beside her. Other traditions have one or both of the daughters sent away before the battle to a remote British region, beyond Roman reach.

Boudicca's Daughters in Ruled Britannia
For his 1598 play Boudicca, William Shakespeare fictionalised the title character's daughters with the names Epona and Bonvica. When the battle against the Romans was lost, Epona threw herself from a ledge rather than be captured by Suetonius. Bonvica then chose to drink poison with her mother. Boudicca let her daughter have a greater dose so as to ensure death.

Literary comment
The name Epona for the older daughter comes from John Fletcher's Bonduca. Fletcher left the younger daughter unnamed, so Harry Turtledove chose Bonvica himself.