I had to google to find out as well but there was a character named Herspheus Chadwick and his son Cheer Chadwick who led the Secret Empire.
https://en.wikipedia.org/wiki/Secret...(organization)
A character named Calvin Chadwick also showed up in Agent Carter as the husband of Whitney Frost in their semi adaptation of Secret Empire (the organization not the story):
https://marvelcinematicuniverse.fand...alvin_Chadwick