Info from: Tim Fisher
Johan Peter Fischer was born on 08 Sep 1735 in South Heidelberg, Berks, Pennsylvania, USA as the second child of Johan Wilhelm Fischer and Elisabetha Gertruat (Gertrude) Hain. He had ten siblings, namely: Elisabetha Gertraut (Gertrude), Johan Philip, Johannes, Johan Henrich, Johan Michael, Susanna, Rosina, Johan Frantz, Johann Friederich, and Johann Georg. He died on 23 Nov 1787 in Lower Heidelberg, Berks, Pennsylvania, USA. When he was 16, he married Anna Elisabetha before 31 May 1752 in Berks, Pennsylvania, USA (Could be another Peter). When he was 22, he married Appolonia Heckert,daughter of Michael Heckert and Catherine Heberer, between 17 Apr–16 May 1758 in Lower Heidelberg, Berks, Pennsylvania, USA (St. John's Reformed (Hain's) Church by Rev. Waldschmidt; no date but between records of the above dates).

Johan Peter Fischer lived in Lower Heidelberg, Berks, Pennsylvania, USA between 1767–1768 (on tax list; 100 ac. 1767, Blacksmith 1768 100 ac.). He was employed as a Blacksmith; supposedly paper mill (1898 mug book so suspect!) between 1768–1779 in Lower Heidelberg, Berks, Pennsylvania, USA. He lived in South Heidelberg, Berks, Pennsylvania, USA in 1771 (Land deeded in father's will). He lived in Lower Heidelberg, Berks, Pennsylvania, USA in 1779 (tax rolls 200 ac. blacksmith). He served in the military in 1780 in Reading, Berks, Pennsylvania, USA (6th Bat. 3rd Co. Capt. Conrad Eckert Berks Co. Militia; from http://www.phmc.state.pa.us/bah/dam/MilitaryRevMilitiaBerks.htm; on St. John's Reformed (Hain's) Church plaque). He signed his will between 08 Nov 1787–11 Mar 1788 in Reading, Berks, Pennsylvania, USA (Will & estate on Familysearch. Dates filed & proven). He was buried on 25 Nov 1787 in Wernersville, Lower Heidelberg, Berks, Pennsylvania, USA (St. John's Reformed (Hain's) Church by Rev. Boos).

Johan Peter Fischer and Appolonia Heckert had the following children:

Henrich Fischer was born on 09 Dec 1758 in South Heidelberg, Berks, Pennsylvania, USA (according to berks Co. wife was Christiann!). He died on 21 Jun 1823 in Catharine, Blair, Pennsylvania, USA. He married Susanna Ruth on 01 Jan 1781 in Reading, Berks, Pennsylvania, USA (Hain's?).
Rosina Lidia Fischer was born on 13 Jan 1761 in South Heidelberg, Berks, Pennsylvania, USA. She died on 20 Jan 1815 in Bern, Berks, Pennsylvania, USA. She married Valentine (Valentin) Mosser (Moser) on 19 Mar 1782 in Brecknock, Berks, Pennsylvania, USA.
Michael Fischer was born on 10 Jun 1763 in South Heidelberg, Berks, Pennsylvania, USA (Michael s/o Philip also poss. but unlilkely). He died after 1787 in Berks, Pennsylvania, USA (Peter's will. Michael d. 16 Dec 1845 is son of PHILIP).
Johannes Fischer was born about 1764 in South Heidelberg, Berks, Pennsylvania, USA. He died about 1856 in Lower Heidelberg, Berks, Pennsylvania, USA. He married Rosina Hain on 21 Mar 1796 in Reading, Berks, Pennsylvania, USA (or 20 Mar in Trinity Lutheran Ch.).
Elisabetha Fischer was born on 09 Jan 1766 in South Heidelberg, Berks, Pennsylvania, USA (or 19 Jan). She died on 20 Aug 1854 in Harlem, Delaware, Ohio, USA. She married David Adams on 13 Nov 1785 in Wilkes-Barre, Luzerne, Pennsylvania, United States (Looks fishy).
George Fischer was born in 1767 in South Heidelberg, Berks, Pennsylvania, USA. He married an unknown spouse (could be Catharina Mohn of Heidelberg 9/1/1795 @ Schwarzwald (prob. Hain's)).
Catharine Fischer was born on 17 Mar 1769 in South Heidelberg, Berks, Pennsylvania, USA (or 11 Mar).
Wilhelm Fischer was born on 20 Jun 1773 in South Heidelberg, Berks, Pennsylvania, USA (Hist. Hains Family & graveyard reading in Hist. Hains Ch.). He died on 20 Jun 1847 in South Heidelberg, Berks, Pennsylvania, USA (Hist. Hains Family & graveyard reading in Hist. Hains Ch.). He married Margaretha Spohn in May 1790 in Lower Heidelberg, Berks, Pennsylvania, USA (St. John's Reformed (Hain's) Church).

Johan Peter Fischer and Anna Elisabetha had no children.