Otto (German: Otto Wilhelm Luitpold Adalbert Waldemar; 27 April 1848 – 11 October 1916) was King of Bavaria from 1886 until 1913. However, he never actively ruled because of alleged severe mental illness. His uncle, Luitpold, and his cousin, Ludwig, served as regents. Ludwig deposed him in 1913, a day after the legislature passed a law allowing him to do so, and became king in his own right. Otto was the son of Maximilian II and his wife, Marie of Prussia, and the younger brother of Ludwig II.