hob (n.) Look up hob at Dictionary.com
"clown, prankster," short for hobgoblin (q.v.). Hence, to play (the) hob "make mischief" (by 1834).
hob (n.) Look up hob at Dictionary.com
"side of fireplace," 1670s, alteration of hubbe (1510s), of unknown origin, perhaps somehow related to the first element in hobnail.
Hob Look up Hob at Dictionary.com
c. 1300, Hobbe, a variant of Rob, diminutive of Robert (compare Hick for Richard, Hodge for Rodger, etc.). Also a generic proper name for one of the common class.