Friedrich noted in his family journal :
Gottfried Leibniz was born on 1 July 1646 , toward the end of the Thirty Years ' War , in Leipzig , Saxony , to Friedrich Leibniz and Catharina Schmuck .
Friedrich Leibniz noted in Gottfried Leibniz 's family journal :
Gottfried Leibniz was born on 1 July 1646 , toward the end of the Thirty Years ' War , in Leipzig , Saxony , to Friedrich Leibniz and Catharina Schmuck .