For a name in the pre-revolutionary spelling, search for modern usage. If none is found, establish the name in the pre-revolutionary spelling, and make a reference from the modern spelling. Later, when there is 80% usage on works with the modern spelling, change the heading to the modern spelling.
If the author lived after the orthographic changes, the heading may be changed to the modern form when the first item arrives with the modern usage.[RI22.3D]