Drusus Julius Caesar
Bassa had at least one sibling or half-sibling, a brother named Gaius Rubellius Plautus who was one of the nearest heirs of the blood of Tiberius, being the grandson of Drusus Julius Caesar. Plautus was forced to kill himself in 62 and his wife Antistia Pollitta and children were executed four years later, perhaps because the children were direct descendants of previous Roman Emperors.