Johannes Thedens was Governor-General of the Dutch East Indies from 6 November 1741 until 28 May 1743.
Thedens, born in a largely Dutch settlement in Friedrichstadt, Schleswig, sailed on 17 December 1697 as a soldier aboard the Unie to the Dutch East Indies. In 1702 he was appointed to the post of 'Assistant' in the Dutch East India Company and in 1719, to 'Buyer'. He then progressed up through the ranks to 'Chief Buyer' then 'Head of Post' at Deshima in Japan.
In 1731, he was co-opted to the Council of the Indies and in 1736, he was made a full member. In 1740 he was appointed by the Directors as a 'First Councillor and Director General' of the Indies. On 6 November 1741, following the dismissal of Adriaan Valckenier, he became 'interim' Governor General. He continued in office up to 28 May 1743, and was able to overcome the Chinese insurrection and put the sugar trade on a better footing. He was succeeded by Gustaaf Willem baron van Imhoff. He died in Batavia