Derek Haynes has provided the following:
On the evening of the 31st September 1941 during an air raid over Sunderland two members of the Hogan family died: Norah aged 19 years and Denis aged 8 years, of 68 Cato Street.
Norah and Denis Hogan are remembered in Southwick on S130.02
The CWGC entry for Norah Hogan
The CWGC entry for Denis Hogan