Sylvain Van de Weyer

Jean-Sylvain Van de Weyer (19 January 1802–23 May 1874) was a Belgian politician, and then the Belgian Minister at the Court of St. James, effectively the ambassador to the United Kingdom.

Born in Louvain or Leuven, Van de Weyer's family moved to Amsterdam in 1811. The family returned to Leuven when his father, Josse-Alexandre (1769-1838), was named police commissioner for the city. Jean-Sylvain studied law at the Katholieke Universiteit Leuven and set up as a lawyer in Brussels in 1823. Here he frequently defended newspapers and journalists which fell foul of the government of the United Kingdom of the Netherlands, of which modern Belgium then formed the southern half.

On the outbreak of the Belgian Revolution in 1830, Van de Weyer was in Leuven, but hurried to Brussels where he became a member of the central committee of the Provisional Government of Belgium. His command of the English language resulted in him serving as a diplomatic representative of the revolutionaries. King Leopold I appointed Van de Weyer his "special representative" in London.Van de Weyer later served as Prime Minister of Belgium.

He married Elizabeth, only daughter of Joshua Bates of Barings Bank, and formerly of Boston.One of his granddaughters was Sylvia Brett, last Ranee of Sarawak.He was Vice-President of the London Library from 1848 till his death in 1874.