John Quincy Adams was the son of President John Adams and his wife, Abigail Smith. My records show him to be their only son but they did have a daughter, Abigail Adams b.1765. History shows only these two children being born to John Adams. President John Adams parents were John Adams (1690/91 - 1761)and Susanna Boylston Adams (1698/99 - 1797) They had 3 son's;Peter Boylston 1738-1823, Elihu 1741-1776, and John b. 1818. If I can help further let me know.