Category:Dukes of Frisia
{{cat exp|monarchs of the Frisian Kingdom ({{circa}} 600–734), usually called dux ("duke") in Frankish sources, rarely called "kings". Some men were still called dux of Frisia after 734.}}
{{cat exp|monarchs of the Frisian Kingdom ({{circa}} 600–734), usually called dux ("duke") in Frankish sources, rarely called "kings". Some men were still called dux of Frisia after 734.}}