sárkány ('dragon') was an accepted part of Hungarian culture and
folklore prior to the 18th century, eventually becoming associated with
natural phenomenon such as storms. Thunder was considered to be the
roar of dragons fighting above the clouds, with their tails striking
the clouds causing floods and rainstorms.
The knight and dragon (complete with swords for teeth) allude to the robot and monster in 'Appetite for Destruction' by Robert Williams.