Am also interested in William P. Johnson and Mary Francis Johnson who I believe is his daughter. She married Samuel L. Studdard in the home of William P. Johnson. William P. Johnson is the son of Price M. Johnson born about 1797 in SC. In the 1850 censu of Fayette Co.AL William is in the household of Price and Nancy Johnson. I have been "told" that Price married Nancy Kizziah Aldridge, daughter of Isham Aldridge but have not found substantial proof of this. Some say Price's wife was Nancy Spears probably based on the 1850 census where a Juda(?) Spears,female age 70,is living with Price and Nancy.
WIlliam P. Johnson is in the 1860 Census of Fayette Co., AL with wife Elizer,born in AL.In the 1970 census of Fayette Co.,AL William P. and wife Eliza J. age 31 are living in township 14 Dublin post office
By 1880 William P. Johnson is still in Fayette Co., AL but with a wife S. L. age 26.In 1900 he is in Fayette Co., AL with a wife named Elizabeth A. age 38.
Have looked for Ashley and Celia Aldridge in 1850 census in AL but have not been able to find them.
Hope I haven't muddied the waters or confused you more.If Eliza who married William P. Johnson was an Aldridge then they must have been closely related.