A portrait of him along with an enslaved servant by Dutch artist Frans van der Mijn in on display at the Rijksmuseum in Amsterdam.

[2] When the Director-General of the Dutch Gold Coast, Pieter Valkenier, resigned in 1725, he advised the Colonial Council to install either Robert Norre or Pranger as his successor.

In 1732, the factory in Jaquim was looted and burnt by forces from the Kingdom of Dahomey; in response, Pranger dispatched a diplomatic expedition under the leadership of his subordinate Jacobus Elet to Abomey in order to negotiate with King Agaja.

In June 1735, Pranger left the Gold Coast on a slave ship headed for Surinam.

[5] Almost immediately after his return to the Dutch Republic, on 5 July 1736, he married Elisabeth Oloff, who died a little more than three years later, on 5 December 1739.