The real question is: “How’s his German?” — the male ancestry of the “British” royal line traces to Germany with some of his ancestors speaking better German than English well into the 20th Century.
Traces back to many things. Everyones ancestry does. The Hanoverian connection is only valid because they are related to the previous dynasy the Stuarts (Scottish), and they in their turn to the one before, the Tudors (Welsh), and before that Plantagent (French).