Klas Fleming may refer to: Klaus Fleming (Clas Eriksson Fleming 1535–1597), Finnish-Swedish admiral. Klaus Hermansson Fleming (c. 1550–1616), Swedish soldier and historian. Klaus Hermansson Fleming (official) (1649–1685), Governor of Örebro (1680–1681) Claes Adolph Fleming (1771–1831), Swedish count and member of the Swedish Academy. Clas Larsson Fleming (1592–1644), admiral and administrator of the Royal Swedish Navy. HSwMS Clas Fleming, a Swedish Navy mine cruiser. See also. Fleming of Louhisaari, about the family
https://en.wikipedia.org/wiki/Klas_Fleming