Schlieffen (or Schliefen) is the name of an old German noble family from Pomerania. The family, branches of which still exist today, originates in Kolberg. ==History== ===Origin=== The family is first mentioned in records in 1365 with Henning Sleff, who died around 1376, a citizen of Kolberg. He is also the originator of the familial line. Petrus ...