Llanfyllin is a little market town, neighborhood and also selecting ward in a sparsely-populated area in Montgomeryshire, Powys, Wales. Llanfyllin's population in 2011 was 1,532, of whom 34.1% could talk Welsh. Llanfyllin means church or parish (llan) of St Myllin ('m' often alters to 'f' in Welsh). The community hinges on the valley of the River Cain near the Berwyn Mountains in Montgomeryshire, 14 miles (23 kilometres) southwest of Oswestry and 15 miles (24 km) from Montgomery. The River Cain is signed up with by the tiny River Abel in Llanfyllin (most likely called after Cain and also Abel in the Bible), and also meanders via the valley, moving into the River Vyrnwy at Llansantffraid. The community lies between Shrewsbury and Bala, for a long period of time the crucial market communities in this field of Wales as well as the Welsh borders. At close-by Bodyddon there is evidence of a very early British settlement. Llanfyllin may be the "Mediolanum amongst the Ordovices" explained in Ptolemy's Location (c.? advertisement 150), although others argue for Meifod or Caersws. The town is understood for its holy well, Fynnon Coed y Llan. The well is dedicated to Saint Myllin, who is understood to have baptised people right here in the sixth century. The parish church is additionally devoted to Saint Myllin. There is a custom that Saint Myllin is the Irish bishop, Saint Mo Ling (additionally called Moling Luachra) (614-- 697). Nonetheless, this doubts. There is no document of Mo Ling travelling to Wales, and also there is a practice that Myllin is buried under the church of Llanfyllin church whereas Mo Ling is thought to have been hidden at his abbey in Ireland.