The crossword solution for the term 'Brother of Romulus' is Remus (5 letters). Remus was the twin brother of Romulus, the legendary founder of Rome. They were the sons of the god Mars and a priestess named Rhea Silvia. According to Roman mythology, they were abandoned as infants in the Tiber River and were later found and raised by a she-wolf. After Romulus killed Remus in a dispute over who should rule Rome, Remus became a symbol of the city's tragic history.