From History of Allegheny County, Pennsylvania:
(James Sanson Maguire) Mr. Maguire married, in 1855, Mary Ann Sylves, who bore him ten children, of whom the living are: Alexander Edward, Samuel Washington, Robert Getty, James Edgar, John Williamson, William Barclay, Flora Catharine, Laura May and Thomas Charles, with their mother. The first born, Adam, was drowned when eleven years old.
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.