Norway
Norwegian Leonberger Club
Skjærgaarden Kennel
Aldibara's Kennel
Terr-Leon's Kennel
Bukkene Bruse Kennel
Kennel Soldronningen
Son O A' Lion
Stompa & Co. 
Slåttvikas Kennel
Kennel Tambos Løver

Germany
German Leonberger Club
Kennel v. Löwengarten
Kennel von der Geestequelle
Nathalie & Leogang 
Leonberger vom Birkenberg

Holland
Kennel Leo Amicanis

Italy
Kennel Leondomus

Various
International Leonberger Union
Leonberger Database 
Independent Leonberger Database
International Leonberger Database
Leo-Route
Independent Leo Gazette