Complex sentence: The theorem is often attributed to Napoleon Bonaparte (1769-1821), whence its name, although some sources only trace it back to Dr. W. Rutherford's 1825 publication "The Ladies Diary", four years after the French emperor's death.
Split into simpler sentences: The theorem is often attributed to Napoleon Bonaparte (1769-1821). Howver, it may just date back to Dr. W. Rutherford's 1825 publication "The Ladies' Diary", four years after the French emperor's death.