Just like in the comics, Slaughter Swamp is the birth place of Solomon Grundy.
Solomon Grundy is a 19th century English nursery rhyme;
"Solomon Grundy,
Born on Monday,
Christened on Tuesday,
Married on Wednesday,
Ill on Thursday,
Worse on Friday,
Died on Saturday,
Buried on Sunday,
And that was the end of
Solomon Grundy."
Solomon Grundy emerges from the swamp covered in pond weed and looking distinctly green. Crystal Reed starred in the series Swamp Thing (2019).