McPherson in alabama , texas and surrounding areas

I ma looking for my McPherson ancestors. My maternal grandmother is Edith Lou Cooey her Mother was Jessie Beatrice McPherson

* Born 14 Jan 1914 in Athen, Texas, USA

* Died 2 Oct 2002 in Waco, Mclennan, Texas
Her father was David Foster McPherson

* Born 12 May 1889 in Alabama

* Died Mar 1971 in Waco, McLennan, Texas

His mother was Lula Pittman born abt 1871. I have no other information on the family David Foster McPherson married Amanda Vashti Dunlap

* Born 18 Jun 1896 in Birmingham Alabama

* Died 11 Feb 1939 in Waco, McLennan, Texas

They Had 5 children Louis b. 1912 d. 1912, Jessie Beatrice b. 1914 d. 2002, Daniel b. 1916, Opal Lilly b. 1919 d. 1963, and Annie Mae b. 1922.If anyone has any information I would be greatly appreciative of he help.