[no obj.] (of a monarch) renounce one's throne: in 1918 Kaiser Wilhelm abdicated as German emperor | [with obj.] Ferdinand abdicated the throne in favour of the emperor's brother.
(From The Oxford Dictionary of English (2nd edition revised) in English Dictionaries & Thesauruses) using University of Minnesota database.
In 1814, only two months after Napoleon had abdicated and been exiled to Elba, leaving an exhausted and bewildered France and yet another Louis on the throne, Nicolas Appert made a visit to London(Pickled, Potted, and Canned, page 236-37)
Sentence- The British ruler abdicated his throne to marry his love, Whitney Creed, who had no royal blood and was just a poor peasant.