Hagiographer dismisses Grieg as a member of old royal family? (7)

I believe the answer is:

pharaoh

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'family?' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for pharaoh that I've seen before include "A Rameses maybe" , "Ancient Egyptian ruler" , "Old Egyptian king" , "Ancient king of Egypt" , "Eg, Tutankhamen" .)

I've seen this clue in The Irish Times.

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