Some of this information may be wrong. I found that the information that my mother-inlaw gave me tends to have errors. I have found a Samuel Donaldson from Venango Co, PA, who had 9 childern with Mary A being the 6th and his wife died in 1875 but I can't connect this family definitely to my husband's family.(There is also an uncle William who lives in the same area and a cousin named Louisa) This family seems to fit with my Mary Ann Donaldson, anyone with information on the these Donaldsons please let me know. Thanks