[1] The first mention of him in records is with his brother John de Menteith in a compact dated on 20 September 1286, at Turnberry, Carrick, between Bruce and the Stewarts.
[2] In another writ, of uncertain date, granted by their father to Kilwinning Abbey, he and his brother are styled Alexander and John de Menteith.
[3] Alexander joined with his father in a charter granting the church of Kippen to the Cambuskenneth Abbey situated within the earldom as a place of burial; the writ being dated 1286.
His detention was not long, however, and he was liberated after promising to serve the English King, meeting with him at Elgin 27 July 1296.
[2] He repeated this promise, and swore fealty at Berwick a month later, on 28 August, as Alexander Comes Meneteth.