Dear Debbie, In answer to your question John and Lydia(Lukens)Dubree are the grandparents of Abraham Dubree. Just to finsh what I have on the Dubree's for you here it goes:

Eliza Jane 2/15/1850
parents-Absalom Dubree(11/14/1780-6/10/1859)
and Sarah Ann (7/9/1781-1/3/1826)
Absalom is buried at Penn Hill Friends Meeting House in Bucks Cty, PA along with his daughter in law Mary Kinnard.
grandparents-John Dubree(1756-1/25/1834) and
Lydia Lukens Dubree(6/19/1760-6/2/1839)
If you would like more info send me your address and I'll photocopy all of the other info to you such as Brothers and sisters etc.
Sincerely Lynda Mauro