» See also elder Welfs. The House of Welf (or House of Guelph) is a European dynasty that has included many German and British monarchs from the 11th century until the 20th century. The House of Welf is the older branch of the House of Este, a dynasty whose oldest known members lived in Lombardy in the 9th century. For this reason, it's sometimes also called Welf-Este. The first member of this branch was Welf IV; he inherited the property of the Elder House of Welf when his maternal uncle Welf… (More on Welfs)