Genealogy of The Clan Gregor - 120, Ancestry of Sir James McGrigor of Campden Hill

[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 have not been able to confirm that.
I looked at Debrett's peerage (1902) which only confirms the Baronetcy details for the 3rd baronet so looked at Burke's peerage which included 5th baronet. Ancestral information ob Burke's the same with no references.

[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.

[6] https://www.thepeerage.com/p50429.htm#i504281
Sir James McGrigor, 1st Bt. was born on 9 April 1771.
He was the son of Colquhoun McGrigor and Ann Grant. He married Mary Grant, daughter of Duncan Grant of Mullochard, Strathspey, on 23 June 1810.
He died on 2 April 1858 at age 86.
He graduated from Edinburgh University, Edinburgh, Midlothian, Scotland, with a Master of Arts (M.A.) He graduated from Edinburgh University, Edinburgh, Midlothian, Scotland, with a Doctor of Medicine (M.D.)
He gained the rank of in 1793 in the Army medical department.
He gained the rank of Surgeon in the 88th Connaught Rangers, served in Holland, Flanders, West Indies and India.
He was appointed Fellow, Royal Society (F.R.S.)
He gained the rank of Superintending Surgeon in 1801 in the Egypt.
He was Inspector-General of Hospitals in 1809.
He was Chief of Medical Staff, Wellington's Army in the Peninsula in 1811.
He was appointed Knight in 1814.
He was Director-General of the Army Medical Department between 1815 and 1851.
He was appointed Fellow, Royal College of Physicians, London (F.R.C.P.)
He was created 1st Baronet McGrigor, of Campden Hill, co. Middlesex [U.K.] on 30 September 1831.
He was appointed Knight Commander, Order of the Bath (K.C.B.) in 1851.

[7] https://www.thepeerage.com/p50429.htm#i504281
Children of Sir James McGrigor, 1st Bt. and Mary Grant
Jane Grant McGrigor d. 28 Jan 1902
Sir Charles Rhoderic McGrigor, 2nd Bt. b. 2 May 1811, d. 13 Jan 1890
Walter James McGrigor+2 b. 18 Mar 1817, d. 7 Jun 1891

[8] Charles McGrigor or McGregor, who retired from the service as lieutenant-colonel 70th foot, and died barrackmaster at Nottingham in 1841 (see Gent Mag. 1841, pt. ii. p. 93)

[9] James was born in 1819, educated at the East India Company's military academy at Addiscombe, and in 1834 received a Bombay infantry cadetship.
On 24 Feb. 1835 he was appointed ensign in the late 21st Bombay native infantry, in which he became lieutenant 18 July 1839 and captain 24 Jan. 1845.
As a lieutenant he served under Sir Charles James Napier [q. v.] in the Sind campaigns, and for a time was adjutant of the Guzerat irregular horse.
He became brevet-major 28 Nov. 1854.
In September 1857 McGrigor, still a captain and brevet-major, was in command of the 2l8t Bombay infantry at Karachi.
The Indian mutiny was at its height, and Bartle Frere had just sent away every available European and Balooch soldier either to Multan or the South Maratha country [see under Fbeee, Sib Henby Babtle Edwabd].
Only 147 Europeans remained at the station in addition to the native garrison. Shortly before 11 p.m. on 16 Sept. 1857 McGrigor was warned by two faithful native officers that a mutiny of the regiment and a massacre of Europeans was arranged for twelve o'clock the same night.
Mrs. McGrigor at once most courageously decided to leave her husband's hands free by making her way alone to a place of comparative safety. Snatching a couple of sheets from the bed and wrapping them round her, in the guise of an ayah sue escaped unmolested.
McGrigor hurried to the authorities, and a troop of the Bombay European horse artillery, under Colonel (afterwards Lieutenant-general) Sir George Hutt [see under Htjtt, Sib William], galloped down to the 21st lines, arriving a few minutes before the time appointed for the outbreak. When, on the stroke of midnight, McGrigor ordered the ' assembly ' to sound, the regiment found itself confronted by the battery, with guns loaded and ready for action. In answer to a short but forcible appeal from McGrigor the 21st laid down their arms, which were removed on the artillery wagons. The regiment was disbanded, and some of the ringleaders, who had fled, were brought back by the Sind police, tried by a court-martial of native officers, and executed, not one escaping.
McGrigor received the thanks of the government, and on 20 July 1858 was appointed major of the (late) 30th Bombay native infantry, one of the new regiments then raised in Sind.
On 1 Jan. 1862 he was promoted to lieutenant-colonel of the 15th Bombay native infantry. He had been stationed for some months with his battalion at Aden, passing much of his time on shooting excursions in Arabia, when he was accidentally drowned while bathing, on 28 June 1863.
McGrigor married a sister of Lieutenant-general Graeme Alexander Lockhart of Castlehill, Lanarkshire, and late of the 78th highlanders.
[Indian Army Lists and Registers; Gent* Mag. 1863, pt. ii. pp. 247, 510.] H. M. C.

[10] https://www.thepeerage.com/p5036.
Sir Charles Rhoderic McGrigor, 2nd Bt. was born on 2 May 1811.
He was the son of Sir James McGrigor, 1st Bt. and Mary Grant.
He married Elizabeth Anne Nickle, daughter of Maj.-Gen. Sir Robert Nickle, on 17 November 1850.
He died on 13 January 1890 at age 78.
He succeeded as the 2nd Baronet McGrigor, of Campden Hill, co. Middlesex [U.K., 1831] on 2 April 1858.
Children of Sir Charles Rhoderic McGrigor, 2nd Bt. and Elizabeth Anne Nickle
Dona Edith McGrigor d. 3 Feb 1909
Mary Jane Dallas McGrigor d. 29 Dec 1936
Elizabeth Anne McGrigor d. 13 Jun 1938
Sir James Rhoderic Duff McGrigor, 3rd Bt. b. 27 Apr 1857, d. 4 Feb 1924
Maj.-Gen. Charles Rhoderic Robert McGrigor b. 5 Sep 1860, d. 9 Jul 1927
Colonel William Colquhoun Grant McGrigor b. 25 Nov 1861, d. 4 Sep 1924
George Duncan McGrigor b. 26 Oct 1867, d. 12 Feb 1953

[11] https://www.thepeerage.com/p50431.htm#i504302
Sir James Rhoderic Duff McGrigor, 3rd Bt. was born on 27 April 1857.
He was the son of Sir Charles Rhoderic McGrigor, 2nd Bt. and Elizabeth Anne Nickle.
He married Helen Cornell Meiggs, daughter of John Gilbert Meiggs, on 30 October 1890.
He died on 4 February 1924 at age 66.
He was educated at Eton College, Windsor, Berkshire, England and at Christ Church, Oxford University, Oxford, Oxfordshire,
He gained the rank of Captain in 1878 in the Rifle Brigade.
He succeeded as the 3rd Baronet McGrigor, of Campden Hill, co. Middlesex [U.K., 1831] on 13 January 1890.
Children of Sir James Rhoderic Duff McGrigor, 3rd Bt. and Helen Cornell Meiggs
Lt.-Col. Sir Charles Colquhoun McGrigor, 4th Bt. b. 26 Apr 1893, d. 28 Oct 1946
James Neil Grant McGrigor2 b. 16 Nov 1894, d. 24 Oct 1914
Jean Helen McGrigor+2 b. 28 Jul 1902
Dona Mary McGrigor2 b. 7 Feb 1908, d. 25 Jun 1909

[12] Maj.-Gen. Charles Rhoderic Robert McGrigor was born on 5 September 1860.
He was the son of Sir Charles Rhoderic McGrigor, 2nd Bt. and Elizabeth Anne Nickle.
He married Ada Rosamond Bower, daughter of Robert Hartley Bower and Marcia Lister-Kaye, on 18 February 1892.
He died on 9 July 1927 at age 66.
He was educated at Eton College, Windsor, Berkshire,
He served in East Griqualand, Transvaal, Eqypt, and East Sudan.
He was commissioned, in the service of the 3rd Battalion, King's Royal Rifle Corps.
He was appointed Companion, Order of the Bath (C.B.)
He was appointed Companion, Order of St. Michael and St. George (C.M.G.)
He fought in the Boer War and the First World War.
Children of Maj.-Gen. Charles Rhoderic Robert McGrigor and Ada Rosamond Bower
Admiral Sir Rhoderic Robert McGrigor+2 b. 12 Apr 1893, d. 3 Dec 1959
Mary Ada Bower McGrigor2 b. 24 Sep 1894