Complex sentence: The name of Margaret's another son, Alexander, may point to a variety of traditions, both occidental and oriental: the biography of Alexander the Great was one of the most popular books in 11th-century Kiev.
Split into simpler sentences: The name of Margaret's another son, Alexander, may point to a variety of traditions, both occidental and oriental. For instance, the biography of Alexander the Great was one of the most popular books in 11th-century Kiev.