or over 't Water (c. 1610 – 28 or 29 April 1682), was a merchant/trader and official of the Dutch East India Company (Vereenigde Oost-Indische Compagnie or VOC).

The Japanese however were interested to learn how to use a mortar, but Overtwater was not very willing to explain.

[4] The east coast of Formosa was left by the company, being unprofitable and dangerous.

He was stationed in Ceylon and in 1666 in the Cape colony, where he proposed that children of Malabar slaves could be baptized.

[5] In 1677, he was fired as an extraordinary council in Batavia, being accused of corruption or unfair trade.