Skip, I just returned from a research trip and found in the book "History and Records of Emanuel Church, Tusseyville, PA Lutheran and German Reform" the following:
Magdalen Troester b. 27 Dec 1813 Father/Mother: George and Elizabeth c. 3 April 1814
Catharine Troester b. 16 Feb 1816 George and Elizabeth c. 13 Oct 1816
Jacob Troester b. 6 Dec 1810 George and Elizabeth c. 24 Mar 1811
John Troester b. 2 May 1809 George and Elizabeth c. 10 Sept 1809
Rosina Troester b. 3 Jan 1812 George and Elizabeth c. 1 Nov 1812
My g g grandmother was Mary/Magdalen Treaster/Troester. I hope this is information you don't already have - but it seems to correspond with so much of the Hans Martin Treaster information I've found already.