Tiberius Julius Caesar Nero Gemellus, known as
Tiberius Gemellus (10 October
AD 19–
AD 37 or 38) was the son of
Drusus and
Livilla, the grandson of the Emperor
Tiberius, and the cousin of the Emperor
Caligula.
Gemellus is a nickname meaning "the twin". His twin brother, Tiberius Claudius Caesar Germanicus II Gemellus, died in early childhood in 23 AD.