Claudius I was a Roman emperor who ruled from 41 to 54 AD. Over the years, there have been several synonyms to refer to him. One of the most common synonyms is Tiberius Claudius Caesar Augustus Germanicus, which highlights his full name and titles. Other synonyms include Claudius the God, a nod to the main character in the novel of the same name by Robert Graves, and Claudius Drusus Nero Germanicus, which emphasizes his family lineage. Some historians also refer to him as the "unfortunate emperor," as he was often overshadowed by his predecessors and faced several challenges during his reign.