The most appreciated and important Finnish rottweiler kennel has been vom Heidenmoor. This prefix was given to Maria and Olavi Pasanen in 1949.
In 1945 a rottweiler bitch Sonnbos Happy SKL 8500/I was imported to Finland from Sweden after having mated in Sweden. The sire of the bitch was Tell von der Hackerbrucke SUS 123400 and the dam Mitzy SKKS 814 RR. The bitch had been mated by CH Raj (SKKS 601 TT). Out of the litter born 27th July 1945 were registered males HPH:n Belzebub 20732 XXIX and HPH:n Barry 20952. HPH:n Belzebub and Blackie 4101 (SKKS 2653/47), whose sire was Mär Wills Mac Mahon (SKKS 801 UU) and dam Roxie (SKKS 2034 TT) were the rottweilers on which the breeding of vom Heidenmoor kennel has been based.