Hi Heywood, off the top of my head, I can only answer one of your queries, You ask where the family where in 1911.
Edward was discharged from the Army in 1910 in Jersey. The family then moved to Erdington in Birmingham. The 1911 census has the following:
Edward Monaghan 42
Sarah Monaghan 41
Annie Monaghan 18
John E Monaghan 17
William Monaghan 16
Alfred Monaghan 13
Kathleen Monaghan 11
Mary Vete (Zeta?) Monaghan 5
Hun (Ileen) Monaghan 3
Frank Monaghan 1
Class RG 14, Piece 18339
The names Annie and John E are crossed out because Annie was a domestic servant at Crumpsall Infirmary, Manchester (Annie Managhan) on the 1911 census and John E was at Regent Fort, Jersey (Edward Monagham) on the Channel Islands census that evening.
Frank (Francis) died in 1921, Sarah Monaghan died in 1924 and Edward Monaghan died in 1937.
I'll look at your other suggestions tomorrow.
Census Information is Crown Copyright, from
www.nationalarchives.gov.uk