If as below, the mother's maiden name in the GRO index was Thomas but I can't find a marriage
1891 Holywell
Robert Thomas Head 38 1853 Coal Miner Flintshire
Mary Jane Thomas Wife 36 1855 - Lancashire
Mary Ann Thomas Daughter 10 1881 - Staffordshire
George Thomas Son 7 1884 - Durham
Robert John Thomas Male 2 1889 - Flintshire
David