Bertelsen

Bertelsen and Berthelsen are Danish-Norwegian patronymic surnames meaning "son of Bertel" or cognate "Berthel" (both equivalent of the Biblical Βαρθολομαίος/Bartholomaios, cf. English Bartholomew). There are several people with this surname:

Bertelsen

 * Aage Bertelsen (1873–1945), Danish artist
 * Albert Bertelsen (1921–2019), Danish artist
 * Jens Jørn Bertelsen (born 1952), Danish footballer
 * Jim Bertelsen (1950–2021), American football player
 * Karen Bertelsen, Canadian TV host
 * Ola Bertelsen (1864–1946), Norwegian politician
 * Trond Erik Bertelsen (born 1984) Norwegian footballer

Berthelsen

 * Berit Berthelsen (1944–2022), retired athlete from Norway
 * Bernhard Berthelsen (1897–1964), Norwegian politician for the Liberal Party
 * Hermann Berthelsen (born 1956), Greenlandic politician and mayor of Sisimiut
 * Jacob Berthelsen (born 1986), Danish professional football (soccer) player
 * Johann Berthelsen (1883–1972), prominent and prolific American Impressionist painter
 * Julie Berthelsen (born 1979), Danish (Greenlandic) singer and songwriter
 * Richard Berthelsen (born 1944), former interim executive director of the NFL Players Association
 * Roar Berthelsen (1934–1990), Norwegian long jumper

Other

 * Bertelsen Glacier, Greenland
 * Bertelsen's lanternfish