Mapping Mountains – Significant Name Changes – Y Pellennig - The Remotest Hills of Wales and Y Pedwarau - The 400m Hills of Wales

Cerrig Coegion (SN 790 176)

There has been a Significant Name Change to a hill that is listed in the Y Pellennig - The Remotest Hills of Wales and Y Pedwarau - The 400m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from a Trimble GeoXH 6000 summit survey and LIDAR bwlch analysis conducted by Myrddyn Phillips.

The summit of Cerrig Coegion (SN 790 176)

The criteria for the two listings that this name change applies to are:

Y Pellennig –The Remotest Hills of Wales - Welsh hills whose summit is at least 2.5km from the nearest paved public road and the hill has a minimum 15m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available as a downloadable e-booklet or print-booklet version on Mapping Mountains Publications with the up-to-date master list available on Mapping Mountains to download in Google Doc format. 

Y Pellennig - The Remotest Hills of Wales by Myrddyn Phillips and Aled Williams

Y Pedwarau – The 400m Hills of Wales.  Welsh hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list are five categories of sub hills; 500m Sub-Pedwarau, 500m Double Sub-Pedwarau, 400m Sub-Pedwarau, 390m Sub-Pedwarau and the 390m Double Sub-Pedwarau.  The list is co-authored by Myrddyn Phillips and Aled Williams and is published on Mapping Mountains in Google Doc format.

Y Pedwarau - The 400m Hills of Wales by Myrddyn Phillips and Aled Williams

The hill is adjoined to the Mynydd Du group of hills, which are situated in the southern part of South Wales (Region B, Sub-Region B5), and it is positioned with the A4069 road to its west the A4067 road to its south and east, and has the town of Ystradgynlais towards the south and the small community of Glyntawe towards the east. 

The hill appeared in the original Welsh 400m P30 list compiled by Myrddyn Phillips and published on Geoff Crowder’s v-g.me website, under the invented and transposed name of Pen Bwlch y Ddeuwynt, with an accompanying note stating; Name from bwlch to the North-West.

Pen Bwlch y Ddeuwynt

474m

SN791176

160

12

Trig pillar at 471m to the South. Name from bwlch to the North-West.

When Myrddyn Phillips first compiled this list he thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  His preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance use the name of a bwlch and add the word Pen to it.  This is not a practice that he now advocates as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

Prior to the publication of the 1^st edition of this list by Europeaklist in May 2013, local place-name enquiries were made.  Through these the name of Cerrig Coegion was given for this hill.  Subsequent research found the name recorded in Bugail Y Mynydd Du by Rhys Davies.

Therefore, the name this hill is now listed by in the Y Pellennig - The Remotest Hills of Wales and Y Pedwarau – The 400m Hills of Wales is Cerrig Coegion, and this was derived from local enquiry. 

The full details for the hill are:

Group:  Mynydd Du

Name:  Cerrig Coegion

Previously Listed Name:  Pen Bwlch y Ddeuwynt 

  

OS 1:50,000 map:  160

Summit Height:  473.4m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SN 79087 17673 (Trimble GeoXH 6000)

  

Bwlch Height:  415.4m (LIDAR)

Bwlch Grid Reference:  SN 79544 18696 & SN 79547 18693 & SN 79549 18689 (LIDAR)

Drop:  57.9m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Remoteness:  4.750km

Myrddyn Phillips and Aled Williams (July 2016)