It's not exactly a place as such, it's an administrative area. I doubt anyone would ever say they came from Lower Agbrigg!Anne
Agbrigg was a wapentake, an obsolete term for a sub-division of the West Riding. It was the equivalent of the term "Hundred" used in the South of England.Upper and Lower Agbrigg seem to have stretched from Wakefield to beyond Huddersfield, although it now seems to refer specifically to a district of Wakefield.There was a similar thread on Rootschat some months ago, if you want to search for it.There is more information on wapentakes in Yorkshire (and a map) on Genuki.Jon