Hi! I have a Reidhead ancestor who was probably a brother to your David (father of your John b. 1802). His name was William, b. 1756 in Findhorn. William came to America in 1776 as a commisary in H.B.M.'s 754th Argyle Highlanders. His parents were John Reidhead b. 16 Jul 1727 in Kinloss, Moray, Findhorn, Scotland and Katherine Nishie, b. 12 Sep 1726. They were married 11 Dec 1755 and had the following children: William 1756, John 1758, Anne 1762, Katherine 1764, Anne 1765, James 1767, David 1770, David 1772. I show the father,John, to be the child of John Reidhead and Marjorie Wetson.
I am not able to look up any specifics now as all my backups are in Miami and I won't be back there til later this month. The only references I have available here are: The History of John Reidhead, Jr. and Posterity by Maurine R. (Perkins) Wight and
The Bangor Historical Magazine, v. 5, July 1889-June 1890, by Joseph W. Porter, Editor and Publisher, pg. 226 William Reidhead's Journal.
If any of this helps you, I'm glad. If you'd like to contact me for more information, I'll be at firstname.lastname@example.org
in Miami after the 20th of Sept. Dot Sheeler