Presumably a reference to the ubiquity of cartoon characters - and non-cartoon characters subsequently - with J as their middle initial (everybody from Elmer Fudd to Homer Simpson to Yu-Gi-Oh!'s Pegasus to Ash from Evil Dead). It started with cartoon characters, supposedly as homage to Jay Ward, animator for Rocky and Bullwinkle.
Presumably a reference to the ubiquity of cartoon characters - and non-cartoon characters subsequently - with J as their middle initial (everybody from Elmer Fudd to Homer Simpson to Yu-Gi-Oh!'s Pegasus to Ash from Evil Dead). It started with cartoon characters, supposedly as homage to Jay Ward, animator for Rocky and Bullwinkle.