Genealogy of The Clan Gregor - 121, Descendants of Iain dubh (executed 1612)

[0] I checked the OPRs from Colquhoun (b.1740) back to Gregor (b~1615) without success, so there is no corroboration of any of this.
The reference[S37] in the quoted Peerage pages is to - Mosley, Charles, editor. Burke's Peerage, Baronetage & Knightage, 107th edition, 3 volumes. Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003.
I looked at Debrett's peerage (1902) which only confirms the Baronetcy details up to the 3rd baronet
Then looked at Burke's peerage which includes up to the 5th baronet. Ancestral information on Burke's is exactly the same as on peerage.com with no reference to sources.
The additional relationships on this page (compared to 120) are taken from Dr Richard McGregor's interpretation of Judge John MacGregor's work in the SRO papers (see sketch at note 7)

[1] https://www.thepeerage.com/p50428.htm#i504278
Gregor MacGregor of Easter Drumnacharrie [Grigor MacGregor in Goularich] alleged son of John 'Dhu' MacGregor.
He married Christian McWilliam. He held Drumnacharrie and half Nether Urquhilare from John, Earl of Atholl.
He lived at Easter Drumnacharrie, Scotland, (Grigor MacGregor in Goularich.)

[2] https://www.thepeerage.com/p50428.htm#i504278
John MacGregor was the son of Gregor MacGregor and Christian McWilliam.
He married daughter of Farquharson of Auchenheyle, circa 1658 and gdau of John Couper of Blackchibrich.
He was fiar (owner of the fee simple) of Easter Drumnacharrie, known as Delavorar (or Dalrown) in Strathdown.

[3] https://www.thepeerage.com/p50429.htm#i504281
Gregor MacGregor was the son of John MacGregor and daughter of Farquharson.
He married Marjory Grant, daughter of Robert Grant of Easter Elchies, circa 1681.
He died in 1731.

[4] https://www.thepeerage.com/p50429.htm#i504281
James MacGregor was the son of Gregor MacGregor and Marjory Grant. He married a daughter of Grant of Abernethy
Settled in Milton, by Duthill, Strathspey.
He died in 1761.
On page 296 of Michie's Deeside Tales is a reference in 1711 to John & James, sons of Grigor McGrigor of Delivorar.
James must be the older son. John would be a younger brother

[5] https://www.thepeerage.com/p50429.htm#i504281
Colquhoun McGrigor was born in 1740 at Aberdeen.
He was the son of James MacGregor and a daughter of Grant of Abernethy.
He married Ann Grant, daughter of Lewis Grant of Lethendrie. He died in 1798. He was a merchant.
Familysearch.org has James McGrigor; father: Colquhoun McGrigor. Mother: Ann Grant. Born 9 April 1771 in Cromdale and Inverallan and Advie, Inverness-shire, Scotland. But no references
Colquhoun's dates seemingly came from his tombstone - died 1798 age 58, so born 1740
Gravestone at St NICHOLAS ABERDEEN
Colquhoun McGregor mert Aberdeen d Banff 2 Oct 1798 a 58 1w Ann Grant d 22 Dec 1792 a 52, 2w d 1 Jan 1797 s Robert mert Aberdeen 2nd son d 21 Jul 1799 Lieu Col Chas (1841)...

[7] Chart by Dr Richard McGregor based on Judge John MacGregor's research at SRO

Deposition by Patrick Grant McGrigor in Glenlochy from Grant Papers, SRO, Gordon Castle Muniments box39 bundle 16