Did the Greeks or Romans take up the Egyptian Gods when they invaded and conqured Alexandria?
Ok, basically the Greeks and Romans – especially the Romans – had a very inclusive attitude to religion. Nowadays we’re a bit stuck in thinking that you’re either one thing or another, but in those days it was a very different kettle of fish. The Graeco-Roman way was to assimilate foreign deities into their own pantheon – usually by going, “Hey, your god X is kind of like our god Y – let’s mash them together and have the god Xy and then everyone’s happy!” eg Osiris-Dyonisus. The other thing they did was sometimes a god would become popular in the Empire as part of a mystery cult, which is what happened with the goddess Isis – she was worshipped by a sect of followers all over the Roman Empire.