Julius Nicolaysen

Julius Nicolaysen (31 July 1831 – 25 December 1909) was a Norwegian professor of medicine.

Personal life He was born in Bergen as a son of merchant and banker Lyder Wentzel Nicolaysen (1794–1876) and Cathrine Margrethe Wilhelmine Bernhoft (1808–1871). He was a half-brother of Nicolay Nicolaysen and first cousin of Niels Aars Nicolaysen.

In April 1859 in Borre he married his first cousin Bolette Marie Berentine Nicolaysen (1835–1922). They had the sons Johan Nicolaysen, He was also an uncle of Lyder Wentzel Christie Nicolaysen

He chaired the Norwegian Medical Society in 1880, received an honorary degree at the University of Copenhagen in 1879 and was a fellow in the Norwegian Academy of Science and Letters from 1875. He was decorated as a Knight of the Order of St. Olav in 1889; upgraded to Commander in 1897.