The death certificate does show father to Delia Fusz being John Foley along with husband being John Fusz.
The newspaper article gives Delia's husband's name as John Fusz and states they were married at Eagle Rock which is now Idaho Falls, Idaho USA. It goes on to mention the children and spouses to some.
Mrs. (Margaret) J. W. Grossman
Nrs, (Essie) Percy Silver
Miss Florence Adelle (and states her to be the baby)
Son, is Alban Fusz
The distant cousin stated that there was one more child named Jessie (born 16 Jun 1886 and died in 1893 in Pocatello, Idaho USA.