Further information which may help you to decide if you have the line I'm looking for.
James William Kerruish born 23.1.1901 had a sister Isobel and a step-brother Eddie Oates. His father was,(I think) Frederick Kerruish and his mother Margaret surname unknown.His grandparents were possibly William Kerruish b.Dec.1874 and Margaret Kewley.
As far as I am concerned there is a strong likelihood that this is the line but I have yet to prove it.