I thought we had a thread for the family tree of the modern Greek Royal family and I took my time searching page after page for where to post this. If there is one thread already, feel free to send this one there. thanks!
The link I found relates to their Byzantine ancestry. Comes to mind that in the past their non-Greek origins have been placed into question but, when you climb down the branches of their family tree, the modern Greek Royals seem to be as Greek as the ancient Constantinople itself.
Byzantine ancestry of Greek Royal Family
With so many Byzantine imperial branches associated with them maybe it's about time they pick up a last name that relates to the area closer than to their association to the Danish royal family. The Bonaparte's main branch became separated from the rest with the surname Napoleon,
so there is historical precedence for the Greek royals to consider an appropiate surname if they choose to.