I looked on Roglo data basis but there is no trace of such descendance.
But OTOH I found a double relationship of Tatiana Blatnik, Pss Nicholaos of Greece to the vey same George II - one via his legitimate issue, the other via one illegitimate son, the same ancestor of Pss Nora of O-O
Maybe someone can fill the blanks (xx) or even found the Nora-George II relationship.
I don't remeber reading of Tatiana's royal ascendance at the time of her engagement/wedding
Tatiana is the last xx on the tree.
That makes Nicholaos a cousin in the 7th degree of one of Tatiana's parents (I hate all those xx's)
All the other relationships between Nicholaos & Tatiana :