THE NAME OF ALLARDYCE AND EARLY MENTION OF THOSE WHO BORE IT. (BY WILLIAM H. ALLARDYCE, 1923) ... extract below:-

It has been proven that the Allardyce family is of Norman descent by Nisbit, "System of Heraldy."

Allardyce of Allardyce an ancient family in the shire of Kincardine. they got a charter of the lands of Alrethes from King William (the Conqueror), since called Allardyce from whence that surname; from this time there is a series of writs in the hands of the Laird of Allardyce. The present Laird is the heir of the line of the Earls of Monteith and Airth.

As quoted by Burke, the name has had various spellings: Allardis (was witness to a charter of Bishop Henry, Cheynes, circa A.D. 1249.

Aliasundre de Allardash did homage to the King (Edward) August 1296.

Walterus de Allyrdas was indemnified for destruction of corn and cattle at the seige of Dunnottar in 1337.

Thome de Allerdas received payment from the Crown, 1364 and 6 April 1369 had an annual of 20 s. out of Little Barras.

Johannes de Allyrdass dominus ejusdem granted a charter to Johanni dicto Harmer of all of his lands in Ardgraive, dated at Aberdeen, September 1376.

Bowditch, in "Suffolk Surnames," 1838 mentions Allardice as extinet (sic) in Massachusetts.

SOURCE: Allardyce Family Genealogy Forum

SOURCE: History page at History Page for Allerdice and Allardice