Is the current Queen Elizabeth II directly descended from that line, or is she from some other branch that developed after James I? Pete

And he remains a stroppy git to this day!The accession of Elizabeth to the throne brought up the question of the name of the royal house. The Duke's uncle, Louis Mountbatten, advocated the name House of Mountbatten, as Elizabeth would typically have taken Philip's last name on marriage; however, when Queen Mary, Elizabeth's paternal grandmother, heard of this suggestion, she informed the British Prime Minister Winston Churchill, who himself later advised the Queen to issue a royal proclamation declaring that the royal house was to remain known as the House of Windsor. The Duke complained,"I am nothing but a bloody amoeba. I am the only man in the country not allowed to give his name to his own children."