I think the lady he's with as wife on the 1911 census could be Nellie Maud Dear.
Although I haven't yet found a marriage for them or a birth for Eric Montague 1910.
1901 53 Bk Greenough Street Wigan.
Robert Michael Dear 45, Grocers ass. Wife Kate 43, Robert Montague 17, Learning French polishing. Nellie Maud 15, Agnes Daisy 11. All born Huntingdon.
John Frederick & Kate both 10 (Twins maybe) both born Wigan.