"Maurice Wilhelm, Duke of Saxe-Merseburg (5 February 1688 – 21 April 1731) was a duke of Saxe-Merseburg and member of the House of Wettin.
He was born in Merseburg, the fifth (but second surviving) son of Christian II, Duke of Saxe-Merseburg, and Erdmuthe Dorothea of Saxe-Zeitz." - (en.wikipedia.org 30.01.2020)