Gielis; c. 1675 – 2 July 1722) was a Dutch whaler, navigator, cartographer, and polar explorer.
A published abstract in the Royal Geographical Society's proceedings remarked in 1873 that such voyages "have never been equalled [sic] up to the present day".
[1] He then continued his route eastward in an open sea and sighted an unknown high land at 80 degrees north—the island of Kvitøya—which would not be seen again until 1876.
The location appeared on charts as "Giles Land" for a number of years,[2] and it was visited for an exploration in 1898 by Alfred Gabriel Nathorst.
[4] Giles died at sea on 2 July 1722, and was buried in Den Helder on 19 August.