[1] Sir Thomas Gray in his Scalacronica states that William the Lion in 1174, on his return from captivity in Falaise and in England, brought back young Englishmen of family to seek their fortune in the Scottish Court; and among these were named the "Biseys".
[2] The first of the name recorded in Scotland is Henricus Byset, who witnessed a charter by William the Lion granted before 1198.
His son, John Byset, who witnessed a charter by Henry de Graham in 1204, was the individual who obtained from the king the grant of lands in the north.
At a tournament held at Haddington in that year Walter Byset, lord of Aboyne, was worsted by the young earl of Atholl.
At the desire of Sir William Byset and to free him of suspicion of guilt, Ralph, bishop of Aberdeen excommunicated those who had partaken of the murder of the earl at Haddington: The bischope of Abbyrdeyn alssua He gert cursse denownsse al tha That gert be art, or part, or swyk, Gert bryn that tyme the Erl Patrik In al the kyrkis hallely In Abyrdenys dyocysi Schir Wiljam his processs Gert be donBissets still flourish in Aberdeenshire and Moray.