He was born in Kristiania as a son of district physician John Georg Schlytter Stub (1870–1942) and Arnolda von Westen Sylow Kjeldsberg (1873–1955).
[3][4] His mother, was half English on the maternal side,[5] and a sister of Francis Kjeldsberg.
She was named after Founding Father Arnoldus von Westen Sylow Koren.
[1] From 1934 he was an associate professor at the Institute of Pharmacology, University of Oslo and chief physician at Trondheim Hospital.
[1] He became board member of Nasjonalforeningen mot Tuberkulosen in 1935 and chaired the Trondheim branch.