Adair, M'Dowall, Haltridge / Hattridge, Belfast 1700s

Wigtownshire Testament Registers. vol. 1-2 AD1641-1731.
FHL film 0231254
Inventory of McGAW ? AD1703
mentioned Robert ADAIR of Maryport (Wigtownshire, Scotland)
and John ADAIR "younger".

There was a Mcgaw who left Stanrare (Stranraer ?)in Scotland perhaps connected to James McGa -

PARISH OF KIRKMAIDEN, Wigtownshire, Scotland.
Janet Lawful daughter of James MCGA and Margrat ADAIR Kirkmaiden By Drummore b. 30 Aug, baptized 4 Sept 1748.

Would Margrat Adair be connected to Robert Adair,
son of Andrew Adair & Sarah Dunber ?

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2 June 1670 GD141/211
Instrument of Sasine at the hand of James McKittrick N.P. narrating that
William Adair of Corghie in implement of his Marriage Contract with Anna McDowell
sister of Patrick McDowell of Logan dated 2 June, 1670,
infeft the said Anna for life in the 5 merklands of Corghie in the parish of Kirkmadin
[note in Scottish Archives : In 1680 Wm. Adair younger of Corghie married Grizzel McDowell sister of James McDowell of Gillespie (P.R.S. III f. 177) and was succeeded by James Adair his brother in 1723 who settled at Belfast and had three sons, William, who predeceased his father unmarried, Patrick and James. Patrick survived his father but made up no titles to the estate and died in 1764 without male issue. James settled in London and died in 1782 leaving a son James Adair sergeant-at-law who had to establish a title as heir to his grandfather James.]
Description Wit:- Mr. Alexander Adair lawful son of Sir Robert Adair of Kinhilt, Andrew Adair of Ganoch, Robert Adair of Maryport and Patrick Blaine servitor to Andrew McDowell of Corrochtrie.)

refer Parish Lists of Wigtownshire and Minnigaff, 1684,
Paroch of Inch. page 16 :
LITTLE GENOCH
Andrew Adar.
Sarah Dunbar, spouse
Andrew Agnew
Robert Adair, s. (son)
Helen Agnew, d. (dau)
Margt. Adair, d. (dau)
Grissell McDowal
etc. )
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Was William Adair who d. in Augusta Co, Virginia,
connected to this family - his daughter m. 1stly Mr. Keys / Keyes.

Not sure if Robert Sidney Adair of Virginia & South Carolina may be connected with this family ?