Hasenfratz

Hasenfratz or Hassenfratz is a surname.

Notable people with the surname include:
 * Anna Hasenfratz, Hungarian-American physicist, sister of Péter
 * Frank Hasenfratz (1935–2022), Hungarian-born Canadian billionaire businessman
 * Hans-Peter Hasenfratz (1938–2016), Swiss religious scholar
 * Jean Henri Hassenfratz (born 1755), French chemist, physics professor, mine inspector, and participant in the French Revolution
 * Linda Hasenfratz (born 1966), Canadian businesswoman
 * Mike Hasenfratz (born 1966), Canadian hockey referee
 * Péter Hasenfratz (1946–2016), Hungarian-Swiss physicist, brother of Anna