The spelling varies from Moyniham to Moynihan to eventuall Monahan
1895 Nov 20. Born Edmonton, London , England . He made himself a year older in order to enlist
1901 census at 45, Eleanor Road, Wood Green
1911 census at 37 Thorold Road Wood Green N (note on MIC too)
1914 Aug 19. Lands in France.
1915 Feb 17. MID Gazetted
1916 Mar 11. DCM Gazetted
1917 Apr 14. Commissioned. RFA The undermentioned Wt. and N.C.O.'s to be 2nd Lt. for service in the Field:—Serjt. Alfred Stephen Moyniham
1919 Oct/Dec Married at Whitney, Oxon to Dorothy Flora Weeks
1920 Jul 30 Joined ADRIC with service no 61. Posted to A Coy
1920 Oct/Dec Born son at Edmonton. Dudley N S Moynihan
1921 Jan 1. Promoted Section Leader
1921 Aug 12 Re-engaged for a further contract in ADRIC
1922 Jan 18. Discharged on demobilisation of ADRIC
1922 Apr 27 Leaves Southampton for Canada on SS Scotian. Single, ex-RIC, going to Canada to settle. He gives his mother Adelaide Bessie Moynihan as his nearest relative in UK.
1925 Wife petitions for divorce ( J 77/2189/8564 ) on the grounds of adultery
1926 On Electoral Register at Thorald Rd, Wood Green. With his mother and brother Cecil
But I cannot get him anywhere after 1926
However
1930 An Ancestry tree has him marrying Rosina Buick in Ontario, Canada
The Ontario Marriage register has , which indeed is our man as his parents are the same as on marriage cert - George Monahan/Monaghan & Bessie Saville
1931 census has then in Toronto