Origine of the name d'Aprix, or Apvril Avril or Dapvril

Dynasty Aprilis Stoffensi Domi,or Staufer, Friius , Avril de Saint Genis ,Aprilis Suabae Sicanae Fontis, Avril de Burey anjou , Apvril or d'Aprix.They were Protestants in a predominantly Roman Catholic France.In 1844, surviving members of the family came to the Kourland,tho the United States, Australia .Fredrik (Fred d'Aprix is reputed tho have said that the family , when French , fled to live in German occupied Alsace Lorrain.Fredrik duc of Alsace is a direct descendant of Philip Isadore d'Aprix Prince Duc of Bretagne and Alsace Lorrain.In the North of France ,they tend not pronouncethe final "x".They would say "dahpree" or April, Avril, d'Affrey, Friius, Ex Freya, Staufer.