The historic landscape area of Ffaldau is a detached portion of HLCA
023 Rhondda Fach: Eastern Enclosed Valley Sides. An outlying parcel of
enclosed land separated by more precipitous topography allowed from HLCA
023 Rhondda Fach: Eastern Enclosed Valley Sides to the southeast, specifically
comprising surviving medieval/post-medieval enclosure as documented in
cartographic sources. The place-name Ffaldau, 'enclosures or holding pens'
reflects the importance of the area in the pastoral economy of the area.
Exactly what purpose these features carried out is largely conjecture.
The location of Ffaldau near the former farmstead of Maerdy, the Maerdy
or Medieval Reeve's or steward's house or settlement might provide a clue
as to the area's origin and primary purpose; as holding pens, a collection
point for sorting livestock to facilitate accounting and/or control movement
to and from the upland pasture or neighbouring administrative areas. However,
the name might equally indicate an area of fairly late post-medieval (i.e.
18th century) encroachment or enclosure of formerly open mountain pasture,
perhaps based around pre-existing sheepfolds.