William Thaw Sr.
1818 - 1889
William Thaw had five children by his first wife, Eliza Burd Blair, and five by his second wife, Mary Copley Sibbett, who Thaw married in 1867. His children were: Eliza, William, Mary, Benjamin, Alexander Blair, Henry (Harry) Kendall, Edward, Josiah Copley, Margaret, and Alice Cornelia. After William Thaw's death in 1889, Mary Copley Thaw moved to "Lyndhurst", a mansion in Pittsburgh's Squirrel Hill neighborhood.