Isidore de Stein d'Altenstein
Charles Julien Isidore de Stein d'Altenstein was a civil servant in the Belgian ministry of foreign affairs, with a particular interest in heraldry and genealogy. He was born in Mesnil-Saint-Blaise, the second son of Charles Frédéric Guillaume, baron Stein d'Altenstein and Marie-Catherine de Malmédy de Deignée. His father's family was originally from Germany. He married Justine Lysen, with whom he had three children, Julien, Armand and Clotilde.
In 1845 he published a two-volume Armorial du Royaume de Belgique, and from 1847 to 1888 he produced an Annuaire de la noblesse de Belgique. He died in Namur on 9 December 1896.
