Rudolph van Coevorden
Rudolph van Coevorden (died 25 July 1230) was a feudal lord of the Drenthe who led a rebellion against Otto II, Bishop of Utrecht. He defeated and killed Otto at the Battle of Ane in 1228. Otto's successor, Wilbrand, initiated a crusade against the Drenthers. During a truce in 1230, Rudolph was arrested at a meeting in Hardenberg and executed.
- *Sergio Boffa (2010), "Ane, Battle of", in Clifford J. Rogers (ed.), The Oxford Encyclopedia of Medieval Warfare and Military Technology, 3 vols., Oxford University Press, vol. 1, pp. 46–47CS1 maint: ref=harv (link).
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