Derek VII von Cleve
Derek VII was born about 1256 in Kleve, Rheinland, Prussia.  He died in 1305 in Kleve, Rheinland, Prussia.

 Margaret Guelders
Margaret was born about 1250 in Kleve, Rheinland, Prussia.  She died after 1281 in Kleve, Rheinland, Prussia.

 Otto Von Kleve
Otto was born in 1274 in Kleve, Rheinland, Prussia.  He died at the age of 37 in 1311.