Background
Schagen was the son of Sara Alleta van Genegen and Nicolaas Schaghen, Governor of Malacca 1684-1685, Governor of Dutch Bengal (1685-1688), and finally Governor of Amboina from 1691 till his death in 1696.
Schagen was the son of Sara Alleta van Genegen and Nicolaas Schaghen, Governor of Malacca 1684-1685, Governor of Dutch Bengal (1685-1688), and finally Governor of Amboina from 1691 till his death in 1696.
Cornelia and he had a daughter Magdalena Clara Schaghen. After the death of Cornelia, Joan Paul married Susanna Cornelia Breving in July 1723 in Batavia. In 1722 Schaghen became commander of Galle.
The VOC appointed him interim governor of Ceylon on 19 October 1725 which position he held until the arrival of Petrus Vuyst on 16 September 1726.
Vuyst eventually fired Schaghen, apparently for his insistence for following the rules, but Schaghen was reinstated by the VOC after Vuyst was dismissed for his misrule in 1729. In the early 1730s Schaghen moved to Batavia.
In November 1737 he was unanimously voted to become Director General, after the death of the previous office holder, Wijbrant Blom. At his retirement on the last day of 1641 he received the title of Vice-Admiral and was saluted with 9 canon shots on his departure from the Batavia castle He was succeeded as director-general by Herman van Suchtelen.
On December 12, 1746 he was buried in the Oude Kerk.