Thanks for that, it may well be. I have his death cert, died in 1909 aged 70. His father was Patrick Boylan and listed as a Cooper. From a newly-found 1881 Scotland census, his brother is living with them in Port Glasgow. The brother is a quarryman and named Felix. Later he lives in Glasgow with his sister Anne. Weirdly Felix's death cert has the parents listed as John Boylan (Cooper) and Ann Doonan, but Patrick's death cert has the father as Patrick Boylan (Cooper) and mother Mary Doonan...?