"The Dorsey is an extensive earthwork which runs through the South Armagh area and is part of a series of Iron Age earthworks, which run roughly across south Ulster. It extends for 4km and comprises banks, ditches and a wooden palisade (fence)...
Dorsey derives from the Irish Na Doirse meaning 'the gateways' which might suggest that rather than barring access to Ulaidh, it controlled access into the kingdom."
--Borderlands Ireland 

Perhaps you we're looking for:
Dorsey's Tile and Stone
Dorsey and Whitney LLP
The Dorsey Group
Dorsey Schools
Dorsey Music
Dorsey's Locker