The marriage cert will confirm their fathers' names, but this looks like Maurice's birth registration:
Births Sep 1868
CRAVEN Maurice
Sheffield 9c 462
Marriages Sep 1891
CRAVEN Maurice
WALKER Isabel Maude
Beverley 9d 161
1871
RG10/4699; Folio 121; Page 43
Poole Rd, Attercliff cum Darnall, Sheffield
Alfred CRAVEN - Head - 36 - Railway Wagon Builder - Sheffield
Ann CRAVEN - Wife - 38 - Sheffield
Harry Archer CRAVEN - Son - 14 - Joiner - Sheffield
John Alfred CRAVEN - Son - 12 - Scholar - Sheffield
David CRAVEN - Son - 9 - Scholar - Sheffield
Mauris CRAVEN - Son - 2 - Darnall
Lillian Elizth CRAVEN - Dau - 1 - Darnall
Rambler