Originally Posted by
Isleņo
There is truth in this you quote. But we must also acknowledge that during Greco-Roman periods, Greek and Roman practices were accepted and practiced by a wide portion of the entire population, including indigenous populations. Greco-Roman traditions were often held in high regard and were considered desirable by indigenous populations. Shuenemann et al. notes this in the aforementioned study we've discussed here. It's quotes as such:
"On the one hand, the interpretation of literary and archaeological sources is often complicated by selective representation and preservation and the fact that markers of foreign identity, such as, for example, Greek or Latin names and ethnics, quickly became ‘status symbols’ and were adopted by natives and foreigners alike"
In the information you quoted above, we can see that Greco-Roman mummy portraits were popular all over Egypt and not just with particular Greco-Romans found in Fayum:
"Subsequent excavations at sites such as Fag el-Gamus, el-Hibeh, Antinoopolis, Akhmim, and most recently Marina el-Alamein suggest that mummy portraits actually were known throughout much of Egypt, so that the term "Fayum portraits" is no longer valid."
So although a Greco-Roman portrait could indeed be indicative of a Greco-Roman grave, it's not exclusive to this and could also be indicative of an indigenous Egyptian grave, possibly an upper class person, but probably not pharaonic royals.
