Since 1066 when William the Conqueror took the throne, English and Scottish kings have sired at least 150 children out of wedlock. Many were acknowledged at court and founded dynasties of their own; several of today's dukedoms are descended from them. Others were only acknowledged grudgingly or not at all. In the 20th century this trend for Royals to father illegitimate children continued, but the parentage, while highly probable, has not been officially...