 Ptolemy was a first cousin to Germanicus and the Roman Emperor Claudius and a second cousin to the Emperor Caligula, the Empress Agrippina the Younger, the Empress Valeria Messalina and the Emperor Nero.Ptolemy was most probably born in Caesaria, the capital of the Kingdom of Mauretania (modern Cherchell, Algeria) in the Roman Empire.He was named in honor of his mother's ancestors, in particular the Ptolemaic dynasty.