Abba

This is a list of historically verifiable, legendary and fictitious rulers of Frisia, whether they were called chieftains, counts, dukes or kings. The earliest names of Frisian rulers are documented by the chronicles of the Merovingian (Frankish) kings, with whom they were contemporaries. In these chronicles, these rulers were styled dux, a Latin term for leader which is the origin of the title duke and its cognates in other languages. English sources refer to them as kings.