Hello Jocette,
Griffith Valuation extracts Co. Antrim 1861-2
Agnes Tolerton, Trummery, Magheramesk
Richard Tolerton, Mullaghcarton, Magheragall
Elizabeth Tolerton, Knockanavery, Kilraghts
Leonard Tolerton, Aghadavy, Ballinderry
John Tolerton, Poobles, Aghalee
The surname doesn't appear in the 1796 Flax Growers List (Spinning Wheel Census).
There are some posts on Ulster Ancestry indicating that the name is of Huguenot origin but the Huguenot Society of Australia website has a note on the Names page which says "Please remember that, strictly speaking, there is no such thing as a 'Huguenot name' - there are only French names."
Christopher