Andrew Johnson and Lyndon Johnson are neither father and son or grandfather and grandson.
Andrew Johnson , the 17th US president, had the same last name as Lyndon Johnson.
Purely Coincidence.....
Andrew Johnson, Lyndon Baines Johnson, Samuel Johnson ( Mark Twain)
Two. Andrew Johnson and Lyndon B. Johnson.
There were two Presidents named Johnson. The 17th President of the United States was Andrew Johnson from April 15, 1865 to March 4, 1869. The 36th President of the United States was Lyndon B. Johnson November 22, 1963 January 20, 1969
There's no traceable lineage
The two Johnsons, Andrew and Lyndon B. were not related to each other. John Quincy Adams and John Adams were father and son as were the two Bushs. The two Roosevelts were cousins.
Andrew Johnson-Tenessee Lyndon B. Johnson-Texas
Vice President Andrew Johnson nor Lyndon B. Johnson were not killed
Andrew Johnson was president from 1865 to 1869. Lyndon B Johnson was president from 1963 to 1969.
Andrew or Lyndon B. since there were 2.
The US has had two presidents Johnson. Their first names were Andrew and Lyndon.