King of Rhovanion

King of Rhovanion" was a title claimed by Vidugavia, a prince of the Northmen, in the thirteenth century of the Third Age for the rulership of the land Rhovanion.
No one else associated with this title is named in J.R.R. Tolkien's writings.
== Validity ==
Vidugavia's own realm, the "Kingdom of Rhovanion", was between Greenwood and the River Running. Even if Vidugavia was the most powerful of the many Northern princes, it is known that all Northmen were never unified during his period.
It is unknown whether his descendant Marhari was a ruler in the same manner. Marhari fell in the Battle of the Plains, and the loss of that battle saw the conquest of his lands by the Wainriders. The remnant of his people were driven out of their ancestral lands into the Vales of Anduin, and thus any surviving realm of Rhovanion would have ended at this time. From these exiles would descend the northern Men of the Éothéod, whose lords claimed descent from the "kings of Rhovanion", as told in Appendix B to The Lord of the Rings. The use of the plural 'kings' suggests that Vidugavia had not been the only claimant of the title.