Madman is a creator owned fictional character, a comic book superhero that appears in comic books by creator Mike Allred and which has been published by a number of publishers over the years. The character first appeared in "Creatures of the Id" (Oct. 1990). His name, Frank Einstein, is a combination of Frank Sinatra and Albert Einstein, and is also a reference to Frankenstein.
Mike Allred had not been born yet as of 1959.
There isn't anything in the text to prove or disprove this statement as we only know that he created a comic book in 1990. It's difficult because the system has trouble with statements referencing existence/birth like this.
( z1 bear :polarity - :ARG1 ( z2 person :name ( z3 name :op "Mike" :op "Allred" ) ) :time ( z4 yet ) :time ( z5 as-of :op ( z6 date-entity :year 1959 ) ) )