The Ptolemies of Ancient Egypt & Palestine

[Kasumi]

Ancient Egypt queen 'killed by poison in flask' - The Independent
German researchers have discovered a carcinogenic substance in a flask believed to have belonged to Queen Hatshepsut, who ruled Egypt 3,500 years ago, raising the possibility that she may have accidentally poisoned herself.

Did Skin Cream Kill Egypt’s Queen Hatshepsut?

[Meraude]

Originally Posted by Velasco

What I don't understand is, why did the Greek Ptolemy family suddenly embrace Ancient Egyptian practice of royal incest? And from that point on, marry their own siblings, in some cases father-daughter marriages, and even multiple marriages (ie, two brothers married to the same sister, simultaneously.

It's not only the Egyptian royal history that is full of incest, so is both the Egyptian and Greek mythologies. If being familiar with myths and stories full of incest I wouldn't think that the step to actually marrying a family member is that far away, especially when living in a country where royal incest was accepted and almost expected.