Prince Philip, the late Duke of Edinburgh, allegedly had a spiteful nickname for Meghan Markle, according to a shocking revelation in Ingrid Seward’s upcoming book, My Mother And I, RadarOnline.com has learned. In the book, Seward claims that Philip referred to Markle as the “Duchess of Windsor,” drawing a parallel to Wallis Simpson, the American socialite who married King Edward VIII. The reference to Simpson is significant, as she married Edward VIII in 1937 after he abdicated the British throne amidst much controversy. Seward asserts that Philip found it “uncanny” how much Markle resembled …