He is discussed in length in "The Road to Disappearance", by Angie Debo, 1941, Oklahoma Press. Since he supported the British during the American Revolution, he returned to Scotland after the war.

<From Among the Creeks site: http://homepages.rootsweb.com/%7ecmamcrk4/index.html>
Lachlan McGillivray
LifeNotes: a Scottish trader out of Charleston, SC. He may have had a sister named Margaret McGillivray.

From Dr. Marion Elisha Tarvin's "The Muscogees or Creek Indians, from 1519 to 1893-- also an Account of The McGillivray Family and Others of Alabama":
"Lachlan McGillivray, a Scotch boy of sixteen summers, had read of the wonders of America. He ran away from his parents at Dunmanglass, Scotland, and took passage for Charleston, S.C., arriving there safely in 1735, with no property but a shilling in his pocket, a suit of clothes, a stout frame, an honest heart, a fearless disposition and cheerful spirits. About this period the English were conducting an extensive commerce with the Muscogees, Cherokees and Chickasaws. McGillivray went to the extensive quarters of the packhorse traders in the suburbs of Charleston; there he saw hundreds of packhorses, pack-saddles and men ready to start to the wilderness. The keen eyes of the traders fell on this smart Scotch boy, who, they saw would be useful to them.
"Arriving at the Chatahoochie his master, as a reward for his activity and accommodating spirit, gave him a jack-knife which he sold in Charleston on his return. The proceeds of this adventure laid the foundation of a large fortune. In a few years he became the boldest and most enterprising trader in the whole country. He extended his commerce to Ft. Toulouse in the Muskogee or Creek nation. At the Hickory Grounds a few miles above the fort, at the present town of Wetumpka, Alabama, he found a beautiful girl by the name of Sehoy Marchand, of whose father we have already given an account. Her mother, was a full-blooded Creek woman of the Wind family. Sehoy when first seen by Lachlan McGillivray was a maiden of sixteen, cheerful in countenance, bewitching in looks and graceful in form. It was not long before Lachlan and Sehoy joined their destinies in marriage. The husband established a trading house Little Tulsa, four miles above Wetulmpka, on the east bank of the Coosa, and then took home his beautiful wife." Dr. Tarvin was Sehoy's great-great grandson through David Tate and his manuscript has proven invaluable for providing familiy ties (many thanks to Joan Case for this contribution). See Tarvin's McGillivray family piece in its entirety.
Lachlan and Sehoy lived at Little Tallassee in Alabama. In 1782, after nearly 40 years in the Wilderness, because of his loyalty to the crown, Lachlan McGillivray was forced to return to Scotland at the end of the Revolutionary War.

From Woodrow Wallace:
In America the McGillivray Clan was fur traders, a very lucrative business in those days. The Dunmaglas Estates in the Scottish Highlands had fallen on bad times, since the Battle of Culloden, in which the McGillivrays were participants on the side of the Stuarts, who lost to the present English first family. Another branch of the McGillivrays were commissioned from the king in the fur trading business in Canada and around the Great Lakes. Lachlan and Lt Col John were commissioned for the Southeastern Indians. Lachlan with the Creeks, and I think also the Cherokees. Lt Col John McGillivray was a prominent citizen of Mobile as well as being the Indian Agent duing the British tenure (1765-1780). Lachlan and Lt Col John McGillivray never married but fathered children by Indians, who were not recognized in the family because there was no recognized marriages by British law. Lachlan was practically forced to recognize his son Alexander and remember him in his 1762 will, because of his prominence and practical acceptance of him in Georgia. No mention is made of Sophia and Jeaanette, although Sophia was very much attached to her father.
The history of the McGillivray Indian descendants is not considered in the history of the McGillivrays of the Scottish Highlands.
Woodrow Wallace points out that from the perspective of the prominent McGillivray family of Dunmaglas in the Scottish Highlands, Lachlan's story is not of the poor lad of sixteen first appearing in Charleston, but of a business man who came to the New World to engage in the fur trading business. That contradicts the colorful Pickett story of a 16 year old runaway coming to Charleston and making it rich.
The trader James Adair who lived among the Creeks admired Lachlan McGillivray and also George Galphin. He felt very strongly that either one of them should be the Superintendant of Indian Affairs for the English. He writes on page 393 of "Adairs history of the American Indians by Samuel Cole Williams LL.D Editor, (Prommontory Press, New York) First published in 1930 by Colonial Dames of America and dedicated to "Hon. Colonel George Craghan, George Galphin and Lachlan McGillivray Esquires": "There might be introduced even among the Indian I have described, a spirit of industry, in cultivating such roduction as would agree with their land and climates; esecially if the superintendantcy of our Indian afairs, westward, was conferred on the sensible public-spirited and judicious Mr. George Galphn, merchant, or Lachlan Mcgillivray, Esq. of equal merit. Every Indian trader knows from long experience , that both of these gentlemen have a greater influence over the dangerous Muskohge, than any others besides. And the security of Georgia requires one or the other of them speedily to superintend our Indian affairs. It was chiefly the skillful management of these worthy patriots, which prevented the Muskohge from joining the Cherokee, according to treaty, against us in the year 1760 and 1761. -- to their great expierence and hazard of life..."

<From Among the Creeks site: http://homepages.rootsweb.com/%7ecmamcrk4/index.html>
Born: 1719 in Drumanglass, Inverneshire, Scotland;
Married: about 17340 in Wetumpka, now Elmore Co., Alabama;
Died after 1782 Isle of Skye, Scotland
Parents: William McGillivray and Janet McIntosh
Their children were:
- Alexander McGillivray or Hoboi-Hili-Miko, Good Child King, born 12/15/1750, in Little Tulsa, Elmore, AL. See his family page. Married 1st- Elise Manaque or Moniac. Their children were: Alexander McGillivray Jr. (b. 1780; educated in Scotland and Washington, DC with David Tate; d. 1802), Elizabeth "Lizzy" McGillivray (m. Captain Isaac), Margaret "Peggy" McGillivray (m. Charles Cornells). Married 2nd-Vicey Cornells, daughter of Joseph Cornells and a Tuckabatchee.
- Sophia McGillivray, born about 1747. See her family page. Married Benjamin Durant in 1779, Little Tallassee, AL. Their children were: Lachlan Durant
Sophia Durant, Polly Durant, Rachel Durant, John Durant, Betsy Durant, Sandy Durant, Peter Durant
- Jeanett McGillivray, born about 1742 in Little Tulsa, Elmore, AL. See her family page. Their children were: Alexander Milfort, Polly Milfort. Died ca 1814 Rheims, France.
- Elizabeth McGillivray, born about 1744 in Little Tulsa, Elmore, AL. Married (-?) Sumac (b. about 1740) about 1782, Little Tallassee, now Elmore Co., AL. Died in childbirth.
- Daughter McGillivray, born ca 1759, Taskigi, AL. Married James Bailey, son of Richard Bailey and Princess Mary.

• Married: ABT 1745 in Wetumpka, Creek Nation ³

1. Sophia MCGILLIVRAY b: 1747 in Little Tallassee, Creek Nation
2. Alexander MCGILLIVRAY b: 15 DEC 1750 in Little Tallassee, Creek Nation
3. Jeannette MCGILLIVRAY b: ABT 1752 in Little Tulsa, Creek Nation

1. Title: World Family Tree Vol. 1, Tree 2888 - Killam, Barrow, Kellam of AL, FL 1733-1995
   Publication: Release date: November 29, 1995
   Abbrev: World Family Tree Vol. 1, Tree 2888 - Killam, Barrow, Kellam of AL, FL 1733-1995
   Note:
   Has key link from Killam to Weatherford line.
   Page: Tree #2888
   Text: Date of Import: Aug 6, 1997
2. Repository:
   Name: Jared Jones Personal Library
   
   Title: The Road to Disappearance
   Author: Angie Debo
   Publication: Univ of Oklahoma Press, 1941, 1967
   Abbrev: The Road to Disappearance
   Page: P38
   Text: 1730 ran way from parents in Scotland... he married Sehoy Marchand, daughter of commander of Ft. Toulouse and full blood of the Wind Clan...had son Alexander
3. Title: Among the Creeks
   Author: Carol Middleton 1998, 1999, 2000 ©.
   Publication: http://homepages.rootsweb.ancestry.com/~cmamcrk4/index.html#anchor450454
   Abbrev: Among the Creeks
   Note:
   A STUDY of THE PEOPLES of the CREEK TRIBES of SOUTHEASTERN AMERICA & of THOSE WHO LIVED AMONGST THEM