Some background information on the Greig (Grig, Grige, Grieg) families in Rathen.
John Greig & Ann Milne the ancestors of Edvard Grieg were Episcopalians. The marriage of John to Anna "Mill" 14 Nov 1727 is in the Lonmay Episcopalian records, as are the baptisms of their children (no mother named).
The same baptismal records in the Rathen OPR, the Church of Scotland record, are all entered at a later date on one page under the marginal heading "Children of John Grige". The mother is only named for the first child Jean 27 Sep 1728. Unfortunately this baptism on Scotlandpeople and on IGI is to "George" Grige and Ann Miln. This is wrong - the same baptism date is on the the Episcopal record for an un-named child to John Grig. On the OPR baptisms John is consistently at Mosside of Cairnbulg and James Grige in Cairnbulg is always named as a witness.
So, the children of John Greig & Ann Milne in Mosside of Cairnbulg, Rathern were: Jean 27 Sep 1728; Elizabeth 19 Oct 1730; Mary 4 May 1733; Isabel 22 Jul 1735; John 19 Mar 1738; Alexander 19 Jul 1739; Christian 12 Oct 1741; Margaret 8 Nov 1743; James 28 Mar 1745; John 26 Mar 1748.
The previous generation at Mosside has James Gr(e)ig recording baptisms for Alexander 13 Dec 1714; Andrew 4 May 1717; Christian 24 May 1722; Margaret 27 Feb 1725. For the last named, James is recently deceased and his son John is named as sponsor for the child. Baptismal witnesses for James' children were George Hay & Peter Davidson in Mosside, Robert Davidson & William Warrender, George Hay & Andrew Grig in Cairnbulg for the last two.
Assuming that John Greig husband of Ann Milne is the son of James Greig in Mosside, it looks like he has a brother James who has children 1748-58 at Hillhead of Cairnbulg, gravestone in Rathen kirkyard d 30 Aug 1771 age 63, wife Marjery Carle.
The 1696 Poll Book for Rathen has:
James Grig & his mother in Rathen - 12sh
Lord Fraser's tenants Alexander Grig 15sh; James Grig 11sh; Alexander Grig, wife son & daughter 18sh; Michael Grig subtenant & wife 12sh; Andrew Grig subtenant , wife son & daughter £1:4sh
James Grig whitefisher in Inverallochy & wife 18sh.