Many thanks for all of that. Some sites I've searched but will keep trying. I've used Ancestry (census & marriage), family records & Genes Reunited (where I made contact with a Carey family member).
ELLEN CAREY had a brother, MICHAEL, born c1801, who married Maria Cullin at Stepney St Dunstan, London in 1823. He was a 'sugar baker' and 'laborer' and died prior to the 1841 UK census They had 6 children:Michael (1827), Mary Ann(1832), Ellen(1833), Edward(1834), Walter (1836) & Catherine(1838) all born London. Catherine m Edward Reuben Strickland (5 children), she died in 1879 and Edward then married her cousin, ELLEN SULLIVAN, daughter of ELLEN CAREY & THOMAS SULLIVAN.
The children of ELLEN CAREY & THOMAS SULLIVAN were all born in Co. Cork:
WILLIAM (abt.1831-1908) died UK. Married Mary ? (b Ireland c1829), two daughters Bridget & Mary Ann. Mary? d before 1871. William m Mary Hayes (b Tipperary). They had one son, Thomas b1877, London.
MARY (abt.1840 -1902) died UK. Married Patrick Gleeson. No issue.
JOHN (abt.1844-1895) died UK. Married Johanna Welsh, 5 children.
ELLEN (12/06/1853 - 11/12/1929) died Western Australia. Married Edward Reuben Strickland. 6 living children.
Ellen Snr died when Ellen Jnr was abt. 9yo (c1862) and Thomas then moved to London taking Ellen Jnr with him.
Hope the extra information is of use.
Thank you.