links
Keverling Copper Factory in Joure
Joure in the 1700s
Wiewaswie
Alle Friezen
Wumkes.nl Stads- en dorpskroniek van Friesland
Digital Sources
Old Frisian maps, clickable
Rulers of Frisia
History of the Frisian people
Coats of Arms
Frisian aristocracy (adel) in Dutch
FamilyHistory.org Netherlands
Bonninga
Broer Bonninga
Bonninga stins
Haring Harinxma
Haringxma State
Donia Huis
Grutte Pier
Familie Holkema
Families Langenberg en Laagland
Familie Boersma