Johnson's paternal great-grandfather was Circassian-Turkish journalist Ali Kemal[556][557][558] who was a secular Muslim; his father's other ancestry includes English, German and French; one of his German ancestors was said to be the illegitimate daughter of Prince Paul of Württemberg and thus a descendant of King George II of Great Britain.[559] This would make him and Elizabeth II 6th cousins twice removed. However, through Mary of Teck's connection to Frederick II Eugene, Duke of Württemberg they have a closer genealogical link, as they are 5th cousins twice removed. Johnson's mother is the granddaughter of Elias Avery Lowe, a palaeographer, who was a Russian Jewish immigrant to the US,[560] and Pennsylvania-born Helen Tracy Lowe-Porter, a translator of Thomas Mann.[561] In reference to his varied ancestry, Johnson has described himself as a "one-man melting pot" – with a combination of Abrahamic religions great-grandparents.[562] Johnson was given the middle name "Boris" after a Russian émigré his parents had once met.[9] An episode of Who Do You Think You Are? explored the German origins of his middle name Pfeffel.[6][563][564] Through this family line, Boris Johnson is a descendant in the seventh generation of Anna Catharina Bischoff, whose mummified corpse was found in 1975 and identified in 2018.[565][566]

(http://www.autoadmit.com/thread.php?thread_id=4400287&forum_id=2#39257189)