Pil (placename)

Pîl (also rendered as Pill, Pil or Pyll) is a Welsh placename element. The name is defined as the tidal reach of a waterway, suitable as a harbour, and is common along the Bristol Channel and Severn Estuary. The highly localised distribution suggests it may have been part of a common maritime culture on the waterways within the tidal reach of the Severn Sea.

The name is today most commonly associated with the village of Pyle in Glamorgan, and the small village of Pill in Somerset.