Not specifically, but I did try FindMyPast and found nothing there - too many William Millers to go through all of them.
As for occupation, no definite information, except that he sold off in about 1829/1830 the land his family had owned since about 1660, so I would expect him to be a landed proprietor or a gentleman farmer.
If I can get back to Edinburgh I can check the abridgments of sasines to see if he bought any other land, but you have to search the abridgments one county at a time and there are 33 counties in Scotland so it could be a long job.
It is also possible that he emigrated after selling the family land, in which case there isn't much hope of finding him.
