Thomas "Tad" Lincoln
The youngest child of Mary and Abraham, Thomas, was born on April 4, 1853, in the Lincoln home in Springfield. He was named after Lincoln's father, Thomas, but, Abraham nicknamed him "Tad," short for "Tadpole," apparently because of his appearance as an infant. Tad was inventive in thinking up mischief and he became rather famous for his pranks, which he often carried out with the help of his older brother Willie.
Did You Know?
Abraham Lincoln is the only president to hold a patent. His patent was for a system of chambers designed to refloat boats that had run aground. He received Patent No. 6469 on May 22, 1849. Lincoln Home National Historic Site, Illinois