Frederick I, Count of Cilli was born circa 1295 to Ulrich II, Herr von Sanneck (c1255-1316) and Catherine of Heunburg (c1270-c1316) and died 1359 of unspecified causes. He married Anna of Heunburg (c1305-c1328) . He married Diemut von Walsee (c1305-c1357) . Charlemagne (747-814)/s, Henry II of England (1133-1189)/s.
Born Friedrich, Herr von Sanneck he was elevated to the rank of Count of Cilli by Emperor Ludwig IV on 16 April 1341.