Stuart's "Royalty For Commoners" (339:41): Duke of Westphalian Saxons; opponent of Charlemagne; died after 807, buried at Enger; living 778-803.

Defeated by Charlemagne. Saxon king, worshipped a tree. Pagan. Thor was the principal god. Charlemagne cut down the tree, symbol of their magic.
Powerful leader emerged late 770's, realized alliance with Franks was better than constant warfare, and part of the alliance was to be converted to Christianity.