The name appears to be French and does not appear in UK before WW1. So he must have come from abroad to enlist, then stayed in UK
1914 Dec 12. Lands in France
1918 Mar 26 Commissioned 2nd Lt in Bedford Regt.
1918 May 27th Bed Reg. 2nd Lt S Jailler is seconded for service with MGC
1920 Apr 5. Married in Brentford to Winifred Scholfield
1921 Jan . Joined ADRIC with service no 1773. Posted to J Coy
1921 Apr 29 Wounded. Jailler, S., Temporary Cadet, Auxiliary Division, Royal Irish Constabulary: ambushed by rebels and received severe injuries; pension awarded. Macroom Shooting
1921 Apr 29 In Cork Military Hospital
1921 Aug 5 Discharged Cork Military Hospital
1921 Aug 6. Posted to Depot Coy.
1921 Aug 6 to Oct 5. Sick Leave
1921 Oct 12. Discharged medically unfit due to his wounding at Macroom
1945 Jan/Mar married in London to Daisy Newing
1946 Jun 26. Leaves UK for Las Palmas, Canaries. Travels without wife. Aircraft Engineer. Lives in Deal
1948 Jun 12. Leaves UK for Canada. Engineer. A London address, but intending to live in Canada.
1949 Mar 23. Arrives in UK from Canada. He is an engineer and lives in Canada
1961 May 21. Died in Devon