The only "potestates" chosen to lead Friesland between the Vlie and Lauwers were Juw Juwinga (1396) and Juw Dekema (1494), both were chosen by the Schieringers. However, in 1399 the districts of Westergo and Oostergo elected potestates, Haring Harinxma and Sjoerd Wiarda respectively, in the struggle against the count of Holland. The title became well known outside of Friesland only with the installation of Albrecht of Saxony as "hereditary potestate" in 1498; the Frisians chose Jancko Douwama as their imperial stadtholder (1522).