Got onto it quicker than I thought!
Here's what I've found - hope it fits.
David Torbitt born 31 October 1880, Ahoyhill, Antrim to parents:
David Torbitt and Jane Mooney Torbitt.
He had a sister Maggie Torbitt born 13 January 1879, Lemnahany, Antrim.
I have found an entry on the 1891 census for the family but no mention of sister Maggie. They are residing at 7 Railway Place, Elswick, Newcastle. As follows:
Jane - head (widow) - 1856 Ireland
Jane - daughter - 1875 - Ireland - image looks like Domestic Servant
Sarah A - daughter - 1877 - Ireland - machinist
David - as above
Samuel - son - 1883 - Ireland
Ann - daughter - 1886 - Newcastle Upon Tyne
Helen A - daughter - 1891 - Newcastle Upon Tyne
I'll have another dig about later on and see if anything more arises for you.
Kay