Marcus Aemilius Lepidus (6–39) was a Roman Patrician and the husband of the emperor Caligula's younger sister Julia Drusilla.
Lepidus married Caligula's sister Drusilla sometime in November or December of 37.
[5] After the death of Gemellus in 37, Lepidus was publicly marked by Caligula as his heir.
[9][10] In 39, Caligula made public letters by his sisters Agrippina the Younger and Julia Livilla that detailed an adulterous affair with Lepidus and a plot against the emperor.
In the Senate, Vespasian made a motion that the remains of Lepidus be thrown away instead of buried.