I made a few wild guesses.
You'll find the birth details of most of the children of Thomas & Christiana on my web site - www.lawsons.ca

The family are in the 1901 census at Richmond Hill, Braddan.

1861, Castletown, district 2, schedule 134, Mill Street
Robert Corkill, head, married, 36, razor grinder, Ramsey
Eleanor, wife, married, 34, Castletown
Robert, son, 3 months, Castletown
Maria, daughter, 9, scholar, Ramsey
Christina, daughter, 7, scholar, Ramsey

Were the family RC ?
There don't seem to be any marriage/baptism records in the Established Church.