Nikolay's son Count Pavel Nikolayevich Demidov (1798–1840) fought as an officer in his father's regiment and received his baptism of fire at the battle of Borodino in 1812. After the war, he entered the Chevalier Guards regiment. He received his discharge in 1831 with the rank of captain when he entered civil service as governor of the province of Kursk. In 1834, he entered service in the Ministry of the Exterior as court Huntsmaster, later State Councillor. Count Pavel Demidov is best known for his philanthropy, primarily for having founded the Demidov Prize. He married the well-known society beauty and maid-of-honour to her majesty the Empress Alexandra Feodorovnya Aurore Stjernvall von Vallen (1808–1903) in 1836. Their son, Pavel Pavlovich Demidov, who became the 2nd Prince of San Donato, was the grandfather of Prince Paul of Yugoslavia.