In Greek mythology, Adonis was a mortal of unusual beauty. Aphrodite and Persephone feuded over him, requiring an intervention by Zeus. The resolution directed Adonis to spend a third of the year with Aphrodite, a third of the year with Persephone, and the remaining third however he wish (which ended up being with Aphrodite). Adonis was killed on a boar hunt with Aphrodite, and she transformed his spilled blood into an anemone flower.
If I'm not mistaken, correct me if I'm wrong, it is Egyptian culture for men to shave their heads because a bald man's head was symbol of the Sun. (Much like hair represents the waves of the sun). Egyptian culture and Greek culture is different, even if ran by the same Gods. Where as Adonis is a symbol of a perfected human man, ascended into the Gods, able to procreate as Aphrodite and Adonis is a symbol of love between Gods and humans (in general it can be platonic and non-romantic), but it can be romantic as well as the Gods did have children with humans.
Yes. The Gods have many different aliases across cultures. More of the Hieratic Divine Names for our Gods will be shared by High Priest Hooded Cobra in the future.