Johnston's widowed mother, Sarah Bush Johnston, married Abraham Lincoln's father, Thomas Lincoln, on December 2, 1819. As a result, the Lincoln and Johnston families were merged, and Lincoln grew up with Johnston and other siblings.
Johnston wed in 1834, but his first wife died in 1850. He had been farming in Coles County, Illinois, with his stepfather (Lincoln's father, Thomas). Johnston married t 15-year old Nancy Jane Williams in March of 1851.
Months later, Lincoln became aware that Johnston planned to move. Lincoln advised Johnston to stay in Coles County and work the farm that Thomas Lincoln had left behind. Lincoln wasn't a wealthy man, but he was more prosperous than Johnston, who began to ask Lincoln for financial help. Lincoln took a dim view of his step-brother's requests. In 1851 he wrote to Johnston, "You are destitute because you have idled away all your time… Go to work is the only cure for your case."
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Marriied Mary Barker October 13 1834 -----7 children
Married Nancy Jane Williams 1851------ 1 child
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Thomas L. D. Johnston, Son of John & Mary Johnston, was born March 17th 1838– January 10th 1837–
Abraham L. B. Johnston, Son of same parents, was born March 27th 1838–
Marietta Sarah Jane Johnston, Daughter of same parents, was born January 31st 1840–
Squire H. Johnston, son of same parents, was born, December 15th 1841–
Richard M. Johnston, son of same parents, was born, October 26th 1843–
Dennis F. Johnston, son of same parents, was born, November 18th 1845–
Daniel W. Johnston, son of same parents, was born, December 13th 1847–
Nancy Jane Williams, was born, March 8. 1836 (married 1851)
Mary Barker was born July 22nd 1816–