This street was created in 1946 as part of the Wm Culliton Addition, filed by Jules Vern Nadreau (1894–1979) and his wife, Geraldine “Dean” Mable Harvey Nadreau (1897–1958). It appears to have been named after Jules’s middle name, Vern. (My assumption is that he was himself named after French novelist Jules Verne.) Its sister street, 300 feet to the south, is S Dean Court, named for his wife.
S Vern Court begins at Beacon Avenue S and goes 275 feet west to an alley.