👉 Bithynia is a Greek term that means "cousin" or "brother" in ancient Greek. It refers to the sister of Alexander the Great, who was also known as Bithynus and was the youngest son of Alexander the Great's mother, Cleopatra VII of Egypt. The term bithynian is often used to describe someone who is related to a great Greek hero or king, such as Alexander the Great. It can be used in a figurative