>>511142881
Yup, also:
George Washington: Although he was married to Martha Dandridge Custis, who had children from a previous marriage, he had no biological children of his own.
James Madison: He married Dolley Payne Todd, who had a son from a previous marriage, but they did not have any children together.
Andrew Jackson: He and his wife, Rachel, adopted a nephew named Andrew Jackson, Jr., but they did not have any biological children together.
James K. Polk: He and his wife, Sarah Childress, did not have any children.
James Buchanan: He never married and had no children.