Sir Theodore Janssen, 1st Baronet

Sir Theodore Janssen of Wimbledon, 1st Baronet (c. 1658 – 22 September 1748) was a French-born English financier and Member of Parliament who after a long and successful career in commerce was ruined and disgraced by his part in the South Sea Bubble.

Janssen was born in Angoulême, France, son of the paper maker Abraham Jannsen and Henriette Manigault. His grandfather, Theodore Janssen de Heez, had taken refuge in France from the Duke of Alva's persecution in the Netherlands. Janssen moved to England in 1680, making his home at Wimbledon, where he bought Wimbledon manor. He was naturalised as an English subject in 1685, and later knighted by King William III on 26 February 1698. In 1694 he was a founder-member of the Bank of England, investing £10,000 and becoming a director. In 1697 he published a pamphlet A Discourse concerning Banks, and in 1713 his treatise General Maxims of Trade.

At the particular request of the Prince of Wales, he was created a baronet on 11 March 1715, shortly after the accession of George I. He entered Parliament in 1717 at a by-election, as member for Yarmouth (Isle of Wight).

By 1720, Janssen had accumulated a fortune of almost quarter of a million pounds. However, among his business interests had been the South Sea Company, of which he was a director. On the collapse of the company he, together with the other directors, was arrested and summoned before the House of Commons to account for himself. After he and Jacob Sawbridge, the first two directors to be summoned, had been heard, a motion was proposed and passed unanimously that both "were guilty of a notorious Breach of Trust, as Directors of the SouthSea Company, and thereby occasion'd very great Loss to great Numbers of his Majesty's Subjects, and had highly prejudic'd the publick Credit". They were expelled from their membership of the Commons (as were the other directors subsequently), and their assets confiscated to make reparations to the investors ruined in the crash.

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