Hugo Zu Furstenberg
Hugo Zu was born about 1335.  He died on May 24th, 1371.

 Adelheid Von Krenkingen
Adelheid Von was born about 1340.  She died before July 15th, 1359.

 Adelheid Zu Furstenberg
Adelheid Zu was born before July 15th, 1359.  She died on March 19th, 1413.