Complex sentence: In April 1783 he married Johanna Margaretha Bull (1758--1818), daughter of Jens Bull, himself a former son-in-law of Vincent Stoltenberg (1694--1763), ancestor of the Stoltenberg family.
Split into simpler sentences: In April 1783 he married Johanna Margaretha Bull (1758--1818). His father-in-law Jens Bull was a former son-in-law of Vincent Stoltenberg (1694--1763), ancestor of the Stoltenberg family.