Jupiter Fidius was an ancient Roman god known for his protection of oaths and honesty. He was also associated with the concept of loyalty, which makes him an important figure in Roman mythology. There are several synonyms for Jupiter Fidius that reflect his role as protector of oaths and loyalty. These include Iuppiter Fidelis, Iuppiter Conservator, and Iuppiter Stator. All of these names reference Jupiter's role as a guardian of honesty and keeper of promises. Ultimately, Jupiter Fidius was an important deity in ancient Rome who symbolized the value of loyalty and the importance of keeping one's word.