Otto II Guelph
Otto II was born about 1270.  He died on April 10th, 1330.

 Mathilde Von Wittelsbach
Mathilde Von was born in 1275.  She died at the age of 44 on March 28th, 1319.

 Wilhelm Guelph
Wilhelm was born about 1295.  He died on November 23rd, 1369.

 Otto III Guelph
Otto III was born in 1296.