Hello,
The web is a wonderful thing. I was just over in Forfar researching my mother's side of the family tree with litle success. However a google search for "william rea forfar" yielded this family tree which incorporates David Valentine and Janet Rea (I remembered seeing their names on the tree when I saw your message).
http://www.soutar.net/pafg06.htm#574Janet Rea was my Mother's great grandfather Joseph Rea's older sister:
1) Agnes, 17th May 1812, Dunnichen, Angus
2) William, 2nd December 1818. Woolrich
3) Janet, 29th December 1820, Scarborough, Yorkshire
4) James, 13th November 1823,North Shields
5) Mary Ann, 24th July 1827, Forfar, Angus
6) Joseph, 6th April 1830, Forfar, Angus (6th child)
7) Elizabeth,10th October 1833, Forfar
In our branch of the family, the family name Rea stopped with my Mother's generation.
Here's some great info about Janet Rea's parents.
http://www.soutar.net/pafn07.htm#1273Cheers,
Alison