Truhn or Thrun surname

Hello list,
I am researching "TRUHN OR THRUN" surname originally from Postelau, Danzig,
Westprussia now called Postolowo, Dirschau, Gdanskie, Poland.
Karl (Charles) Truhn or Thrun born 1815 married Maria (Maryann) Engler born
1820 Hanover, Germany. I am 90% sure Karl was a farmer.
Any information will be helpful.
Eric Truhn