Tracing family history back that far can be tricky indeed!
Lots of townland names, like surnames, become changed over the years and some do indeed disappear completely.
Have you tried contacting the Ulster Historical Foundation
to see if they can shed any light on the townland of Toreagh, as indeed there seems to be no record of it anymore?
There is a Toreagh Primary school 5 miles south of Larne in a place near Raloo which may be of some connection to the old townland.
With Larne being on the coastline close to Scotland, many families traveled this route and do so still today.
Hopefully, some of our Industry partners and fellow members will have some advice also.