Jean-Jacques Madeleine Willmar was a Luxembourgish politician and jurist. An Orangist, he served as prime minister of Luxembourg for five years, from 6 December 1848 until 23 September 1853.

William III was King of the Netherlands and Grand Duke of Luxembourg from 1849 until his death in 1890, and was also the Duke of Limburg from 1849 until the abolition of the duchy in 1866. Having reig