The Egyptian god Amun was depicted with ram horns. The ram was revered in ancient Egypt in matters of fertility and war.
Rams were considered a symbol of virility due to their rutting behavior. The horns of Amun may have also represented the East and West of the Earth, and one of the titles of Amun was "the two-horned." Alexander was depicted with the horns of Amun as a result of his conquest of ancient Egypt in 332 BC, where the priesthood received him as the son of the god Amun, who was identified by the ancient Greeks with Zeus, the King of the Gods.
The Temple of the Oracle (Temple of Amun) at the Siwa Oasis in Egypt