Farmslists - list of all parishes of Bornholm and the number and name of each farm.
Parishmaps - maps of each parish in Bonrholm showing where each farm is placed.
Landregistration 1658 - 1689 - list of taxpayers of each farm.

Material on the Internet:

The Local Historical Society of Bornholms - materials for download.
Churchbooks of Bornholm up till 1814 - extracts
Censuses 1769 - 1921