Kupfer
Kupfer is a German surname (meaning copper); notable people with this surname include:

Bettina Kupfer (born 1963), German actress and writer
David Kupfer (born 1941), American psychiatrist
Harry Kupfer (1935–2019), German opera director
Herbert Kupfer (1927–2013), German civil engineer
Jochen Kupfer (born 1969), German operatic baritone

See also

German-language surnames
Occupational surnames