Lachlan married Sehoy Marchand, member of the Wind Clan of the Creek, a daughter of Jean Marchand and Sehoy
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He was the father of Alexander McGillivray and the great-uncle of William McIntosh and William Weatherford, three of the most powerful and historically important Native American chiefs among the Creek of the Southeast.
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Sehoy III married a man named Weatherford, and one of their sons was William Weatherford, better known to history by his Creek name, translated as Red Eagle.
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He was born into the McGillivray (or M'Gillivray, as he himself wrote the name) family of the Clan Chattan, a large Scottish clan traditionally led by members of the McIntosh family.
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Early biographers claimed Sehoy Marchand was the daughter of a French officer at Fort Toulouse named Jean-Baptiste Marchand.
The most prominent was Alexander McGillivray, the son of Sehoy, a Wind Clan mother, and Lachlan McGillivray; and William Weatherford (better known in history as Red Eagle or Lamochatta), also born to the Wind Clan.
Lachlan Macquarie | Alexander McGillivray | Scott McGillivray | Lachlan Murdoch | Jonathan Lachlan-Stewart | Murray Lachlan Young | McGillivray Ridge | McGillivray Pass | McGillivray, British Columbia | Lachlan McIntosh | Lachlan McGillivray | Lachlan Fold Belt | Lachlan Donald Ian Mackinnon | Dave McGillivray | Collector's chest featuring Lycett's paintings. The chest is believed to have been presented to Lachlan Macquarie | Alexander McGillivray (politician) |