A while back we were discussing the above. I had occasion to be looking at this today and believe we barked up the wrong tree for her parents.
It would seem that her father was Thomas Caveen b abt 1822 Castletown, her mother was Mary? b Ireland abt 1827

1851 Census
Castletown
16 Malew Street
Thomas Caveen head married 29 Constable b Castletown
Mary wife married 24 b Ireland

1861 Census Index
Castletown 2 168
CAVEEN
Erephia 7 b Castletown
Fanny 6 b "
James 1 b "
Mary 37 b Ireland
Nessy A b Castletown
Thomas 37 b Castletown

1871 Census Index
Castletown 2 105
CAVEEN
Eleanor 17 b Castletown
Elizabeth 7 b "
Frances 15 b "
James 11 b "
Martha 9 b "
Mary 49 b Ireland
Mary A 19 b Castletown
Thomas 50 b Castletown
Thomas 13 b Castletown

1881 Castletown
CAVEEN, Thomas, 2 Parliament Sq, Head, Married, 54, Farmer 24 Acres, C.Town
, C3, 16, , , , , , , Retd Police Constable
, C3, 16, 108, CAVEEN, Mary, 2 Parliament Sq, Wife, Married, 54, , Ireland
, C3, 16, 108, CAVEEN, Mary A., 2 Parliament Sq, Daughter, Unmarried, 27, , C.Town
, C3, 16, 108, CAVEEN, Emma, 2 Parliament Sq, Daughter, Unmarried, 26, , C.Town
, C3, 16, 108, CAVEEN, Elizabeth, 2 Parliament Sq, Daughter, Unmarried, 16, , C.Town
, C3, 17, 108, CAVEEN, James, 2 Parliament Sq, Son, Unmarried, 21, Farmers Son, C.Town
, C3, 17, 108, WILKINSON, Walter, 2 Parliament