Keywords: Prince Adel, son of Friso.png en Prince Adel later King Adel II of Friesland son of Friso 1609 Book Frisia seu de viris rebusque Frisiae illustribus Martinus Hamconius Monasterii Westphal 1609 9781166365998 730442 Martinus Hamconius other versions Custom license marker 2016 12 04 PD-old-auto 1620 PD-1923 Frisian kingdom |