This looks to be Charles with parents in 1871 - as transcribed:
Charles B McGilvray 50 Labourer In Flone Mill, b. Isle of Mall, Argyllshire
Janet McGilvray 50 b. Islay, Argyllshire
Charles McGilvray 18, Labourer In Boot Yard b. Glasgow
James McGilvray 16, Labourer In Iron Foundry b. Glasgow
August (Angus?) McGilvray 13 b. Glasgow
Neil McGilvray 6 b, Glasgow
Address: 123 Garscube Road, Milton
The only Charles showing in his age group b. Glasgow
Monica