@Trevor Wellington None of them are Royals.
One is 8th in line. Meaning 7 people have to die before he can be King (including the King and his father), and if any of those 7 have children (or their children have children) he'll be that much further from the throne.
One is a part of a Ducal House, but has no claim to the throne.
And one is a commoner math nerd with 0 power.