 William Lamberton however most probably originated from the settlement of Lamberton, near Berwick in the Scottish Borders where the family held large estates (Logan Mack 1926).The name Lamberton here was derived from the Germanic name Lambert, whilst Lambroughton, sometimes spelt Lamberton, is derived from a corruption of the clan McLamroch.He was appointed Bishop of St Andrews in 1298 by Pope Boniface VIII in succession to William Fraser.