More info. on this Vans-Agnew family is in "Dictionary of Landed Gentry of Great Britain and Ireland" by Sir Bernard Burke (1858) 929.72, page 6 -
VANS - AGNEW of BARNBARROCH.
Vans-Agnew, Robert Esq. of Barnbarroch, co. Wigton (Ayr, Scotland), s. his father in 1842.
The family of Vans or Vaus claims to be a branch of the great house of Vaux, so celebrated in every part of Europe. (see Burke's Extinct and Dormant Peerage.)
A younger branch of the Dirleton line of the family was that of Barnbarroch, derived from Robert Vans, who acquired from the Earl of Douglas a charter of the lands of Barnbarroch, in 1451.
This Robert Vans, who was eldest son of John Vans, ambassador to England from King James II., in 1437 left issue, Blaize, his heir ; Thomas, ambassador to England, in 1457, dean of Glasgow, secretary to the King, and keeper of the Privy Seal ; George, Bishop of Galloway, and Patrick, Prior of Whitehorne.
The eldest son,
Blaize Vans, of Barnbarroch, m. Elizabeth, dau. and heiress of Sir John Shaw, of Haillie, and widow of Sir John Stewart, of Garlies, by whom he had a son, Patrick Vans, of Barnbarroch, who m. Margaret Kennedy, dau of Gilbert Kennedy, 2nd Lord Kennedy, and great-granddau. of King Robert III (of Scotland)., and left at his decease, in 1528 a son and successor, Sir John Vans of Barnbarroch, slain at Pinkie, whose son, Sir Patrick Vans, of Barnbarroch, ambassador to Denmark...etc....etc.
I cannot see a Bishop Vance of Galloway here, but perhaps he was the above George Vans, Bishop of Galloway.
Wm. Adair m. the dau. of Vance of Barnbarough who was heir to Alexander Vance, Bishop of Galloway.Perhaps the Bishop was unm. and left to his brother Vance of Barnbarough, father-in-law of Adair ?
The lineage went down and included John Vans, Esq. of Barnbarroch, who m. Margaret, only child and heiress of Robert Agnew, Esq. of Sheuchan, (of the Agnews of Lochnaw,) by Margaret, dau. of Patrick McDowall, of Freugh, and upon his marriage, under a mutual entail, assumed the additional surname and arms of Agnew.He d. in 1780.
Any help from Vance or Agnew families aroung Wigton would be much appreciated.Thankyou.