The elder branch of the House of Este included the dukes of Brunswick and Lüneburg ( 1208 -- 1918 ) and produced Britain 's Hanoverian monarchs and one Emperor of Russia ( Ivan VI ) .
The elder branch of the House of Este included the dukes of Brunswick and Lüneburg ( 1208 -- 1918 ) . It also produced Britain 's Hanoverian monarchs and one Emperor of Russia ( Ivan VI ) .