Solomon Grundy
In the late 19th century, wealthy merchant Cyrus Gold was murdered, his body dumped in Slaughter Swamp. Due to the weird properties of the swamp, Gold was reborn years later as a strong and simple-minded monster. Since he rose from the swamp on a Monday, the monster was given the name Solomon Grundy after the nursery rhyme. Because of his simple-minded and violent nature, Grundy has often been involved in crime and destruction.
Grundy has been destroyed many times, and has risen again each time with different personality, ranging from a rampaging mindless monster to sinister fiend. Once he had a gentle, child-like personality and ended up befriending several different super-heroes.