Disambiguation: of the Blackhawks
First published in: 1941
Stanislaus was the Polish member of the Blackhawk Squadron. He served as the team's second-in-command. Stan first appeared in Military Comics (Quality Comics, 1941 Series) #2 (September 1941). He may also have been one of the unidentified members of the Blackhawks that appeared in issues #1,3-4,6-10.
Stan's uncle, Ignace, was introduced in Blackhawk (DC, 1957 series) #154 (November 1960).Link: https://en.wikipedia.org/wiki/Blackhawk_(DC_Comics)