Trying to find information on the mother of Margaret Roberts on this family,from the 1871 or 1861 census, it is probably Liverpool (West Derby), but there is a chance they could have been living on the island. Her mother unknown would have been born before 1844.

Level 1
Thomas Roberts born (probably Birkenhead) c1830
Married
Unknown
7 children
Ann
Margaret c1858 Liverpool (Married Jonathan Quine 9/5/1878 West Derby)
Martha
Mary,
James
Thomas
and another

Level 2
Jonathan Quine, born 5/2/1846 Braddan (died 09/09/1922 Strang)
Married 9/5/1878 Liverpool West Derby
Margaret Roberts, born 1858 Liverpool (died 02/06/1948 IOM)
Children
*Edward Jonathan, born Liverpool 06/08/1879 (married Emily Jane Quirk)
Fenella, born Liverpool 1882
Robert Alfred, born Braddan 1887 (died 1947)
William Hy, born Braddan 1889
Thomas R, born Braddan 1890
Ethel, born Braddan 1898
There are probably two more children George Stephenson Quine, born Toxteth Park, quarter Sept 1883.

and Daisy Maggie Quine, of Strang, age 1 year, buried 10 May 1897. Both buried Braddan

1881 census they are in Liverpool (after this they moved to the Island)
43 Pecksnuff St. North Toxeth Liverpool RG11/3641
Jonathan Quine Head 34 carpenter b IOM
Margaret 22 wife b. Liverpool
Edward J. QUINE Son U Male 1 Liverpool