He complained on occasion about money , but the fair sum he left to his sole heir , his sister 's stepson , proved that the Brunswicks had , by and large , paid him well .
Leibniz never married .
Leibniz complained on occasion about money , but the fair sum Leibniz left to Leibniz 's sole heir , his sister 's stepson , proved that the Brunswicks had , by and large , paid him well .
Leibniz never married .