Well,----
"...And this is law that I'll maintain
Until my dying day, sir--
That whatsoever king may reign,
I'll be the Vicar of Bray, sir!!!"

("The illustrius House of Hanover
And Protestant succession,
To these I do allegiance swear--
While they can keep possession.
For in my faith and loyalty
I never more will falter
And Geo-{um, Cha--um, Wills??} my lawful king shall be--
Until the times do alter.")

I think it's called "Primogeniture": the oldest son of the oldest son--"legitimate" marriage issue.

What was that Alec Guinness movie? Kind Hearts & Coronets?? or something else?               Tw