Lord High Commissioner is the style of high commissioners, i.e. direct representatives of the monarch, in three cases in the Kingdom of Scotland and the United Kingdom, two of which are no longer extant.
Consequently, the remaining office is often known in short simply as the Lord High Commissioner.
The United States of the Ionian Islands was officially a joint protectorate of the Allied Christian Powers, de facto a UK amical protectorate, and was established under the 1815 Treaty of Paris.
The incumbents were: In addition, between November 1858 and March 1859, William Ewart Gladstone served as high commissioner extraordinary to determine the political future of the Ionian Islands.
However, when the Bavarian-born King of Greece, Otto I, was deposed and replaced by the Anglophile king George I, the Ionian Islands were ceded to Greece, ending the position of lord high commissioner.