1) "John Davis Johnston (son of Sarah Bush Lincoln) m. Mary Mary Barker Children: 6 sons, 1 daughter Mary dies and John Davis marries Nancy Williams children: John Davis Jr." Source and further information: http://www.alincolnlearning.us/Lincolnfamilyhistoryprint.html 2) "In what remains of Lincoln's correspondence with his stepbrother John Johnston, for example, we see a man grappling with the difficult question of how best to help those less well off, a member of his own family who has proven himself inept at financial planning." "Abe Lincoln and John Johnston had grown up together, their parents having married in 1819, one year after the tragic death of Lincoln's birth mother, Nancy Hanks Lincoln. When they met, Abe was 11 and John 10. By all accounts, the members of the new, blended family got along well, and while their home was simple, it was an affectionate place." "Johnston's distaste for labor led him to ask his stepbrother for money often, and those requests were obliged for a time. But by December 1848, Lincoln realized that his charity was doing more harm than good. It was doing particular harm to Johnston's children, who were learning the wrong lessons about money and from where it comes." Source and further information: http://www.claremont.org/publications/pubid.140/pub_detail.asp So John Johnston was about one year younger than Abraham Lincoln (February 12, 1809 – April 15, 1865).

My Great grandfathers sister Married Denis Johnson the son of John Johnson Abe's step brother.