Anne, James Roy Grant's (1799 - 1879) wife was Catherine Dingwall (1800- 1864).
It's interesting that John was an Elder, too. There are two deaths of men named John Grant (not designated as Elder) in 1811: one d.12 April, lived No. side of So.Branch and the other,d.4 May, called "Jr." simply says So. Branch. (I'm getting this from photocopies I made years ago of St. Andrew's microfilmed records).