Andresen is a Scandinavian name literally meaning "the son of Anders/Andreas/Andrew" or some other variant of the name Andrew.
However, somebody with the name could still be Jewish. Because Judaism passes from the mother to a new generation but children usually take their father's surname, if a Jewish woman marries a gentile (non-Jewish) man, her children will - according to halakha (Jewish law) be Jewish but will not have a Jewish surname. An example of this would be the English actor and comedian Stephen Fry who has a Jewish mother and therefore is Jewish himself, despite his non-Jewish surname.
Johannes Andresen's birth name is Johannes Peter Eskild Andresen.
Andresen, spelled in this manner wiht an "sen" ending, has a Scandanavian origin.
Gwili Andre's birth name is Gurli Andresen.
The name comes from Scandinavia. It has various forms such as Anderson, Andreasen, Andersen, etc., all meaning "son of Andre" (Andrew is the English form of Andre.) Spelled as Andresen it is primarilly Danish.
Cyril Andresen was born in 1929.
Cyril Andresen died in 1977.
Rachel Andresen died in 1988.
Rachel Andresen was born in 1907.
Stine Andresen died in 1927.
Stine Andresen was born in 1849.
Rannveig Andresen was born in 1967.
Nicolai Andresen was born in 1781.