Exactly, the German countesses could convert to Anglicanism before marriage.
Lady Gabriella is Prince William's second cousin once removed. Her father Prince Michael of Kent is the Queen's first cousin. Also, her grandmother Marina of Greece and Denmark was a first cousin of Prince Philip, so she is also a third cousin of Prince William Dynastically its a perfect match.
Both her mother, Baroness Marie Christine von Reibnitz (German/Austro-Hungarian) and his mother, Lady Diana Spencer (British aristocracy) were "outcrosses" to the usual Oldenburg/Saxe-Coburg-Gotha/Battenberg set of bloodlines which dominate the pedigrees of the modern European monarchies. So I don't think there would be any risk of any unwelcome ailments in their issue (it seems haemophylia has been "bred out" and the last royal was porphyria was Prince William of Gloucester and some distant German cousins).
Lady Gabriella is Prince William's second cousin once removed. Her father Prince Michael of Kent is the Queen's first cousin. Also, her grandmother Marina of Greece and Denmark was a first cousin of Prince Philip, so she is also a third cousin of Prince William Dynastically its a perfect match.
Both her mother, Baroness Marie Christine von Reibnitz (German/Austro-Hungarian) and his mother, Lady Diana Spencer (British aristocracy) were "outcrosses" to the usual Oldenburg/Saxe-Coburg-Gotha/Battenberg set of bloodlines which dominate the pedigrees of the modern European monarchies. So I don't think there would be any risk of any unwelcome ailments in their issue (it seems haemophylia has been "bred out" and the last royal was porphyria was Prince William of Gloucester and some distant German cousins).