From "The Surnames of Scotland" by Dr. G.F. Black
MacGillivray, MacGillavery (Aberdeen), MacGillivrie, MacGillivry, MacGillvary, MacGilvray, MacGilvery, MacGilvra
Gaelic - Mac Gille bhrath = son of the servant of judgement.
The name may originally have been Maolbhrath, as many names have had Maol displaced by Gille.
The Macgillivrays were an old Argyllshire clan or sept, but they do not appear in the 1467 MS.
They are early found in association with the Macleans in Mull, which was probably their original home.
Archibald Makillewray became the rector of the parish of Benbecula in 1535, but spelt it McIluray when resigning the rectory of Ewist in 1542, and McIliwray when becoming chaplain of Isla in 1542.
Ronald McAllen McIlvery or McIlverie was a tenant in Ardnamurchan 1541
Duncam M'Gillewra was a witness in Glenurquhay 1549
Rev. Martin Mc illura, McIlvora, M'Ilvra or M'Ilwra had several ups and downs during his incumbency of different churches in Argyllshire between 1626-50.
Farquar MacGillivray had a feu of the lands in Dunmaglas from Campbell of Cawdor 1622.
Another Farquar MacGillivray of Dunmaglas was one of the signers of a letter to George I in 1715.
Donald Moir McGilwrey granted to James Grant of Freuchie in 1646 that he had been engaged in plundering.
Macgillivrays took a prominent part in the rebellion of 1745, and their chief is said to have been killed in the battle of Culloden, beside the well of the dead.
McGillevorie 1609, McGillavrach 1638, McGillievraid 1713, McGillivray 1672, M'Gillowray 1745, M'Gwillwray 1685, McIlra 1616, McIlvrach 1618, M'Ilvray 1647, McIlwray 1542, MacGillevoray, M'Gillewra, McGilvra, McIlvrae, MacIloray.