Just to re-cap
Christian Valdemar Henri John
Christian has eight godparents. They are Haakon, Crown Prince of Norway, Mette-Marit, Crown Princess of Norway, Victoria, Crown Princess of Sweden, Prince Joachim of Denmark, Pavlos, Crown Prince of Greece, Patricia Bailey and two friends of the couple, Jeppe Handwerk and Hamish Campbell.
Isabella Henrietta Ingrid Margrethe
Isabella's godparents are The Duchess of Brabant, Princess Alexia of Greece and Denmark, Nadine Johnston, Christian Buchwald, Peter Heering and Marie Louise Skeel.
I think we might rule out Henrik, seeing as they have a cousin named that.