Hello Davy W
I had a look on the internet to see if I could see something to help with your name query but could find nothing really useful.
But mainly from the FamilySearch records I found a Greenland Fox living in Scotland. He appears in the following census:
1841 Edinburgh (born England)
1851 Lanarkshire (wife Elizabeth)
1861 Milton
1871 Lanarkshire
There was a baptism of a son John to Greenland and Christain 1824 Paisley.
There are six marriages listed!
1814 Christain McDougall, Greenock
1836 Mary Combe, Paisley
1841 Isabella Fergusson, Edinburgh
1850 Elizabeth Houston, Glasgow
1861 Mary McConnell, Milton
1870 Catherine Brock, Glasgow
I don't have access to Scottish records to check everything out but from the indexes it looks as if it could all be one man!
Looking at the ages on the census records I have a feeling this is your original Greenland Fox born 10th December 1791 in Sporle and baptised on 1st Jan 1792 the son of James. There seems to be no mention of this Greenland in Sporle after his baptism record.
If it is him then he is a long way from Sporle in Norfolk and if it isn't him then you have another incident of the Greenland Fox name born in England and he may be related.
Have you researched this man? I would be very interested to know something about him. Was he the one from Sporle?