"How many knights does the girl see?"
Translation:Skorverdon azantoti riña urnes?
That's just how any construction with "skorverdon" works. The "how many" is always in the genitive.
Skorverdon comes from skore verdon* which literally means what amount. So skorverdon valoti = what amount/number of men
Yeah just like the english How + many. In french we would say that the english is : "comment + beaucoup"