I have a James Devlin my family tree, and I have not yet got round to looking what happened to him.Have you got your James's death certificate? This should be traceable.
If you find his parents were HENRY DEVLIN (born 1859 in Ireland, died February 3, 1929 in Glasgow Scotland) and Jane BRADLEY born 1863 in Ireland, died 1901 in Glasgow Scotland, then I can help with the family history back into Ireland.
Children of HENRY DEVLIN and JANE BRADLEY are: i. HENRY DEVLIN, b. 1883; d. 1944, 133 Balornock Rd Glasgow. ii. MARY DEVLIN, b. 1889, Glasgow, Lanarkshire (census 1901). iii. JOHN DEVLIN, b. 1890, Glasgow, Lanarkshire (census 1901). iv. JAMES DEVLIN, b. 1893, Glasgow, Lanarkshire (census 1901). v. ROSE ANN DEVLIN, b. 1895, Ireland(census 1901). vi. SARAH JANE DEVLIN, b. 1897, Glasgow, Lanarkshire. vii. MAGGIE DEVLIN, b. 1901, Glasgow, Lanarkshire (census 1901).
Of course, there were many other James Devlins in the area at the time, but I would be pleased to hear from anyone with possible connections to this family.