The family claimed descent from a Stephen de Kemeys who held lands in the southern
Welsh Marches, in
Monmouthshire in the 1230s. A David Kemeys, the son of Ievan Kemeys of Began (near
St Mellons) married Cecil, a daughter of Llewelyn ab Evan ab Llewelyn ap Cynfig of
Cefn Mably in or around 1450. David was succeeded by his son, Lewis Kemeys and his son and heir in turn was John Kemeys, succeeded by his son, also named David (possibly born 1564). David's eldest son Edward Kemeys,
High Sheriff of Glamorganshire for 1574, died without issue and the estate passed to a nephew, another David Kemeys, the son of Rhys Kemeys of Llanvair Castle (
Llanvair Discoed), who also became Sheriff of Glamorgan for 1616. He was succeeded by his son Edward who had no issue and the estate therefore passed to Nicholas Kemeys, the third son of Rhys Kemeys. ==Biography==