Hello Tamara, unless you have a specific John Campbell from one of the main lines who is well sourced, I would leave this profile well alone. I have worked out who he is meant to be and will amend the profile which I suspect already exists and will need merged.
I have now identified it as John Campbell of Auchenryre, 3rd son of Sir Duncan Campbell of Glenorchy and his 1st wife Lady Jean/Janet Stewart from the Atholl family. I have added the parents, added a source and proposed a merge with his existing profile.