In Finland

• Blogs by family members (in Finnish): Helmiriitta Honkanen, Leena Krohn, Minerva Krohn, Alexander Stubb

• Reino Kurki-Suonio's family page (in Finnish)
  Contains, for instance, old letters by family members. Requires id and pswd that family members can ask from reino.kurki-suonio(at)tut.fi.

• Breitenstein family tree

• Wikipedia pages of Krohn family and Kiiskilä estate (in Finnish)

• Aino Kallas Association (in Finnish)

Elsewhere

• Krohnbuch
  Krohn pages by Christoph Krohn (Germany), based on Max Krohn's book Chronik der Sippen Krohn, Crohn, Cron, Croon (1939). Data on Abraham Krohn's descendants were provided by Ilmari Krohn.

• Krohn.org
  Krohn pages by Patrick Krohn (Canada)

• Krohn Family Genealogy Forum
  A discussion forum for Krohn families

• Wikipedia
  People with surname Krohn

• Ancestry.com
  Information on Krohn families (mainly in USA)

• House of Names, Coat of Arms Store, CafePress
  Krohn products

• Beer Museum
  St Petersburg Beer Museum