Lake Glen, according to local historian Pól Deeds, derives its name from the townland name Ballycranocke. ‘Cranock’ or ‘cranoge’ comes from the Irish word ‘crannóg’ which means a dwelling or structure that was usually found in the middle of a lake but also sometimes just in marshy ground or surrounded by streams, as was the site near where the houses in Lake Glen were built. In previous centuries there was a fort, an old church and graveyard - or ‘cealdrach’ - and even earlier a crannóg was built on a slight elevation that may have used the streams around it as protection. The church and townland took its name from the crannóg (Capella de Cranoge) and the whole area eventually became known as Callender’s Fort. Pól believes the name chosen for the area that sloped down from the fort to the Falls Road, Lake Glen, came from the ancient crannóg and the townland name Ballycranocke.