Leonberger Databases

There are several databases on the web.
The International Leonberger Union doesn't keep a database.

In some countries clubs have an online database:

Czech Republic

Great Brittain

There is a kennel club database in Sweden:
http://kennet.skk.se/hunddata/

Two privately kept, International Leonberger database:
http://leonberger-database.com

http://ileodata.com