Llewellyn, The way I understand it is that Phillipe Gorgas(b. in 1661-) Who married Hanna Crawford, was the father of Jan (or) John Gorgas b. 1686 d. 1741.
Jan (John) Gorgas, He married Suijten or Sophia Rittenhouse who was born in 1690, d. 1748.They were the parents of Jacob Gorgas b. 7 Apr 1770 - d. 1841. who married Christina Mack, b. 29 Mar 1734 d. 1804
Jacob and Christina were the parents of Joseph Gorgas b. 7 Apr 1770 . d. 1841.
Joseph Gorgas and Sophia Atkinson b. 8 May 1778 d. 23 Nov 1849, were the parents of Josiah Gorgas, and you know the rest of the history...
The above sounds confusing, I will need to do some further reasearch of my archives to give you a more complete data.
P.S.As you know, Jan (or John) and Suijten (Sophia) Rittenhouse had seven children: 1. Susanna Gorgas, 2. John Gorgas, 3. Susanna Gorgas (named after the first daughter they lost at birth), 4. Marija or Mary Gorgas, 5. Benjamin Gorgas, 6. Joseph Gorgas, 7.Jacob Gorgas.
These "first names" repeat throughout the Gorgas family history even in todays members of our family.
Again, Thanks for your interest in the Gorgas family history.