Hank Pym

Dr. Henry ``Hank'' Pym is a fictional character appearing in American comic books published by Marvel Comics. Created by editor and plotter Stan Lee, scripter Larry Lieber and penciler Jack Kirby, the character first appeared in Tales to Astonish #27 (Jan. 1962). The character, a scientist that debuted in a standalone science-fiction anthology story, returned several issues later as the original iteration of the superhero Ant-Man with the power to shrink to the size of an insect. Alongside his crime-fighting partner/wife Janet van Dyne, he goes on to assume other superhero identities, including the size-changing Giant-Man and Goliath; the insect-themed Yellowjacket; and briefly the Wasp. He is a founding member of the superhero team the Avengers.

Question: is giant man and ant man the same person
Answer: yes