I have a Canonsburg Phone Book from the years 1947-1948 that has been passed down to me from my family. In it there is a listing for a Thomas Vlachos, ( wife, Anna) They had one child, they lived in their own home. Thomas's is listed as working at "Tom's Tavern" (Which I am assumeing that he owned) Their home address was 17 W. College Street, Canonsburg, Pa. There were also 2 other listings for Vlachos...Chris Vlachos, who rooms at 17 W. College Street, Canonsburg, Pa. and Thomas Vlachos Jr. who works as a bartender at Toms Tavern, who also rooms at 17 W. College Street, Canonsburg, Pa. I do not know if these are the Vlachos family that you are interested in, they were the only ones in the book. I hope that this may be of help to you.