the eleventh potestaat of Friesland Juw Juws Juwinga
Juw Juwinga (alias Jongema) of Bolsward was a Frisian chieftain that earned great fame in the struggle against the (Dutch) 'infidels'. When Albrecht of Bavaria, count of Holland, threatened Friesland in 1396, Juw was chosen as potestate of Friesland. He advised luring the enemy into the land.