The planet probably got this name due to its red color; Mars is sometimes referred to as 'the Red Planet'.
the famous candy bar also got it's name from mythological figures
( z1 name :ARG1 ( z2 bar :ARG1-of ( z3 fame ) :mod ( z4 candy ) ) :ARG2 ( z5 figure :mod ( z6 mythology ) ) :mod ( z7 also ) )