Which Roman Emperor was married to Livia Drusilla for 51 years?
Julia Livia Julia Livia Julia Livia (c.7–43 AD), sometimes referred to as Julia Drusi Caesaris filia (Julia, daughter of Drusus Caesar), was the daughter of Drusus Julius Caesar and Livilla, and granddaughter of the Roman Emperor Tiberius. She was also a first cousin of the emperor Caligula, and niece of the emperor Claudius. Julia was born in the later year's of the reign of her adoptive great-grandfather, Emperor Augustus, and was the daughter of Drusus Julius Caesar (a grandson of Augustus wife Livia Drusilla through her son Tiberius) and Livilla (a granddaughter of Augustus wife Livia Drusilla through her son Nero Claudius
Drusilla of Mauretania the Elder Dictator Julius Caesar and the Julio-Claudian dynasty. Drusilla was a first cousin of Roman General Germanicus and his brother, the Roman Emperor Claudius, and a second cousin of Roman Emperor Caligula, Roman Empress Agrippina the Younger, Roman Empress Valeria Messalina and Roman Emperor Nero. Drusilla was named in honor of the Roman Empress Livia Drusilla or her late son the Roman General Nero Claudius Drusus. Drusilla was most probably born in Caesaria, the capital of the Kingdom of Mauretania (modern Cherchell, Algeria) in the Roman Empire and she was most probably raised there. Her mother probably died in 6 CE.