Marty, we've communicated by e-mail, but I wanted to post my reply to the Board in case anyone else is interested.
I am descended from one of Stephen, Sr.'s other sons, Samuel Reidinger b. abt 1758, York Co., PA, m. Catherine; through their son, Michael Reidinger/Ridinger b. abt 1802, Montgomery Co., VA m. Catherine Akers; their daughter Mary Myrtle Reidinger/Ridinger b. 1842,Warren Co., TN m. James Richard Haggard of Wartrace, Bedford Co., TN, 1858; their daughter Nettie Jane Haggard b. abt 1871, Wartrace, Bedford Co., TN m. Jesse A. Harris. Nettie Jane is my maternal great-grandmother.
Coincidentally, just yesterday I came across a couple of genealogy home pages with information regarding the early Reidinger/Ridingers. The information on these sites is conflicting as to whether Stephen "Sr." was born in Germany and emigrated here with his father, Johannes Reidinger, or whether he was born here (poss. in York Co., PA or in NJ) after his father came here. Please be aware that I don't have any independent knowledge of this and am still information gathering.
The Genealogy.com page of Cara P. Tunstall states that Johannes Reidinger apparently came over on Sept. 25, 1754 on the Adventure. Here is the link to that page for more info:
Tunstall refers to another Reidinger researcher, Keitha Jenkins Kirk, who has an enormous database worth a look if you haven't seen it. She spells Johannes' surname "Reidiger" but everyone from Stephen on down as "Reidinger"; don't know if that was intentional or an error. Here is that link:
Just for the heck of it, I googled "Johannes Reidinger" and came up with a German genealogy webpage. There were 2 Johannes Reidingers listed for the appropriate time period. One died as a child and the other apparently remained in Germany his entire life, and Stephen was not listed among his children. I also found a "Johannes Rudinger" listed in the PA Foreign Oaths of Allegiance as a passenger on the Edinburgh (no year given.)
From reading on various Message Boards, etc., it appears that Stephen, Sr. may have had a brother, John, who m. Catherine and had at least one son Samuel b. abt 1805 m. Mary Blakely (the Blakely family has a website.) This Samuel is not to be confused with another Samuel also b. abt 1805, who was apparently a brother to my Michael Reidinger/Ridinger and a son of Samuel b.1758, son of Stephen.
Hope this gives you some more info to work with. If you find out more, I'd be interested in hearing about it.
You know, I've just about decided I'm related to half the people in the United States.