Princeton's WordNet

1. Johnson, Samuel Johnson, Dr. Johnson(noun)

   English writer and lexicographer (1709-1784)

2. Johnson, Lyndon Johnson, Lyndon Baines Johnson, LBJ, President Johnson, President Lyndon Johnson(noun)

   36th President of the United States; was elected vice president and succeeded Kennedy when Kennedy was assassinated (1908-1973)

3. Johnson, Andrew Johnson, President Johnson, President Andrew Johnson(noun)

   17th President of the United States; was elected vice president and succeeded Lincoln when Lincoln was assassinated; was impeached but acquitted by one vote (1808-1875)