It is a while since I looked at these Agnews,
but was John Agnew of the townland of Loan, Craig Parish, co Antrim, Ireland, who d. 1777 a son of Patrick Agnew (of Kilwaughter ?) who m. Martha Houston ?
There was a John and William Agnew 25 Dec 1772 noted perhaps in "The Belfast Newsletter" with Rev. Alexander McMullon.
The Houston estate was left to the sisters of John Houston,
and names associated with them were Caulfield and Staples
(refer "Belfast Newsletter Index" 22 Jan 1773, application towns Craig, co Antrim, estate James Caulfield, John Staples, application to John Agnew.)
Book, "Agnews of Kilwaughter" by William Agnew Moore:
Patrick Agnew m. Janet Shaw, and built Kilwaughter in A.D. 1622 succeeded by his son:
John Agnew, m. his cousin, Eleanor Shaw. S. by his son:
Patrick Agnew, m., name of wife not known. Purchased the remaining lands in Kilwaughter, which, up to this date, (A.D. 1660), were owned by Agnews of Lochnaw. (By Sir Patrick Agnew, 9th Hereditary Sheriff of Lochnaw, father of Co. Alexander Agnew of Whitehills, who, with Andrew Agnew, his brother, afterwards the 9th Sheriff, was frequently in Ireland). S. by his son:
Patrick Agnew. d. A.D. 1724, name of wife not known. Children:
1. Patrick Agnew, who succeeded.
2. Margaret Agnew m. James Crawford.
3. Jean Agnew m. Robert Blair, of Blairmount.
4. Helen, m. James Stewart.
Patrick Agnew, who s., and m. Martha Houston, (or Margaret Houseton). Children:
1. William Agnew, who succeeded.
2. Francis or Frances Agnew, who m., and left heirs.
3. John Agnew, m., and left heirs.xxxxxxxxxxxx
4. James Agnew (?)
5. Patrick (?)
6. Henry Agnew m. Grace Harries, and left heirs.
7. Hugh Agnew (?)
William Agnew, s., and m. his cousin, Margaret Stewart, (of Killymoon Castle), to the west of Craigs Parish.
This Stewart family was connected to the Houston family,
perhaps providing a clue to a link between the Ahoghill / Craigs Parish Agnews with Kilwaughter Agnews.
I will have to look up worldfamilies.com
Nice to hear from you again.