After Samuel Fessenden married, he and his wife had several children. The family tree displayed below only shows the offspring of William Pitt Fessenden, however. Two of his grandsons through William became generals in the Union Army during the American Civil War: Francis Fessenden and James D. Fessenden. A third grandson, Samuel Fessenden (January 6, 1841 Portland, Maine - September 1, 1862 Centreville, Virginia), was mortally wounded at the Second Battle of Bull Run. He had been graduated from Bowdoin College in 1861. He also began to study law, but soon entered the military service as second lieutenant in the Second Maine Battery, November 30, 1861. He was promoted to first lieutenant on June 3, 1862 and shortly before his death became aide to Gen. Zebulon B. Tower in July 1862.