Derek III Count of Kleve
Derek III Count of was born in 1129.  He died at the age of 43 in 1172.

 Adelheid of Sulzbach
Adelheid of was born in 1135.  She died at the age of 54 in 1189.

 Count Derek IV of Kleve
Count Derek IV of was born in 1158.  He died at the age of 40 on July 12th, 1198.

 Dietrich I Count Heinsberg-Valkenburg
Dietrich I Count was born in 1181.  He died at the age of 47 on November 8th, 1228.