Disambiguation: Michael Rush, Atlas/Seaboard, 40th Century
First published in: 1975
Andrax first appeared in Primo (Gevacur, 1971 series) #27/1973 ([September] 1973). That story was translated into English and reprinted in The Barbarians (Seaboard, 1975 series) #1 (June 1975).
Link: https://en.wikipedia.org/wiki/Atlas/Seaboard_Comics