The Welsh name refers to the mouth of the Afon Llynfi which enters the River Wye a mile from the village.

[3] These were supposed to have been based on the arms of the medieval Welsh prince Einon Sais, who lived in Aberllynfi, but this is probably a later invention.

[7] Curiously, Sir Edward Williams was not a relation (despite his surname), but married the family heiress in 1675.

He enjoyed the friendship of members of the royal family and King George IV visited him at Old Gwernyfed.

A rugby union club, Gwernyfed RFC, was founded at the school in the 1960s, but now plays at and represents the nearby town of Talgarth.