Lauritz Dorenfeldt Jenssen (4 February 1801 - 7 June 1859) was a Norwegian businessman and politician.
He was born in Throndhjem[1] as the son of businessman Matz Jenssen (1760–1813) and his wife Anna, née Schjelderup Dorenfeldt (1763–1846). His older brothers Jens Nicolai and Hans Peter ran the family company Jenssen & Co; Jens Nicolai later founding a rivalling company Jenssen & Sønner in 1837.[2] Lauritz Dorenfeldt Jenssen enrolled as a student in 1821, and graduated with the cand.theol.degree in 1831. However, he did not become a priest. In 1836 he bought the farm Ranheim in Strinden for 23,000 Norwegian speciedaler, and ran a "significant" industrial company here.[3] He also served as mayor of Strinden municipality, from 1844 to 1845 and 1850 to 1853.
In July 1836 Jenssen married Karen Amalie Hagerup (1811–1890),[1] a daughter of Caspar Peter Hagerup and sister of Henrik Steffens Hagerup.[4] Their son Lauritz established the paper factory Ranheims Papirfabrik,[2] and also served as a politician. Through his son, Lauritz Dorenfeldt Jenssen was the grandfather of chemical engineer Margot Dorenfeldt and politicians Hans Jørgen and Worm Hirsch Darre-Jenssen.[5] [6] Through his sister Nicoline, who married his wife's brother Henrik Steffens Hagerup, he was also the uncle of Prime Minister Francis Hagerup.[7]