Hi Ronauld, I notice you haven't cited what sources you are using for these people? One of the reasons we have some restrictions on creating and editing pre-1700 profiles is to make sure that reliable sources are being used.
Not totally sure how reliable The Camerons: a history of Clan Cameron by John Stewart of Ardvorlich, published by the Clan Cameron Association 1974, would be, but it has a genealogical chart of the Cameron's of Glendessary on p. 213 (image 246 or 386). Although it has John Cameron, 2nd of Glendessary, he doesn't have a son Hugh, nor a grandson James.
John Cameron does have a son Archibald, but again no Hugh or James in his children. John also has a brother Hugh but again no James in that family. In fact James doesn't appear to be a name used in this branch of the Camerons.