To try to find them in 1911, there is possibly at least one daughter Mary born c. 1906? Occasionally you might find a specific birth place in Ireland showing on the censuses. Hopefully, this could tie in with all the info that Gaffy has posted above.
There are two deaths showing on SP where the mother's maiden name is McCrystal:
Agnes McGrory, aged 87 died in 1983 in Coatbridge.
Mary McGrory, aged 76 died in 1982 in Airdrie.
Monica