think this is them on 1891 in Manchester - matches the 1901 in many details (eg 1901 he is a blind Crimean pensioner)
Thomas Obrien 50 - b Galway, pensioner, blind
Bridget Obrien 48 - b London
Michael Obrien 28 - son b Dublin. Groom, married
Henry Obrien 20 - son b Dublin. Labourer, single
Emma Obrien 29 - daughter in law b Liverpool
Mary A Obrien 8
Edward Obrien 6
Henry Obrien 4
Rachael Obrien 1
The young children say son and daughter but I'm assuming this probably refers to Emma as mother.
Given the sons' birthplace, you may need to look in Ireland for a marriage,
RG12, 3237, 112, 21