I saw your request. I have a great-grandfather Petros Vlahos who died in Altoona, PA. Had four daughters, one of whom (Alexandra) was my maternal grandmother. I do
know my grandmother had relatives in Worcester, MA. She had one brother (Gregory) who lived until adulthood and died after WWI in the epidemic. My grandmother's sisters stayed in Greece, in Epirus, which is where the family was. Do you think this Petros Vlahos is also yours? I don't know about his being widowed and remarried. I only know that
he also had two boys who did not reach adulthood, and that he had a bakery in Altoona, PA.