 However it is during the reign of William the Lion that the first reliable record of the family is found, when Serle de Dundas appears on a deed from this period.Later in 1296 Serle de Dundas and Robert de Dundas both appear on the Ragman Rolls swearing fealty to Edward I of England.Sir Archibald Dundas was a favourite of James III of Scotland and was sent by him on several important missions into England.