My grandmother may have been the Stavroula you mention. She lived in Baltimore and had Samuel, Andrew, Steven, Helen (my mother), and another girl sho died young. Stavroula also had a sister named Bessie and brother in Baltimore named Harry. My yiayia could not read or write, and spoke only broken English, but I don't ever recall having trouble communicating with her. She seemed to get along just fine.
They used the shortened name Stratos. My father's father, George Doukas, also came from Gouranos.
What part of the country were you referring to? Do you think this is your Bessie and Stavroula?