Petros K. Giannacopoulos, 76, of Canton, Massachusetts, passed away on June 5, 2022. Born in Vresthena, Greece. Beloved husband of Georgia (Georgakakis)Giannacopoulos. Devoted father of Stacy Katsikaris and her husband Paul, Helene Rontiris and her husband Tommy, and Kostas Giannacopoulos and his wife Jenny. Cherished pappou of Genna Katsikaris, Stephen Rontiris, Charlie Katsikaris, Andrew Rontiris, Nora Giannacopoulos,and Kate Giannacopoulos. Loving brother of Eva Katsikis and her husband Mike and their family. Also survived by brother-in-laws, sister-in-laws, and many nieces, nephews, relatives and friends here and in Greece, Germany and Australia. Funeral Service on Wednesday, June 8, 2022 at St. Nectarios Greek Orthodox Church, 39 Belgrade Avenue, Roslindale, MA at 11:00 AM. Visitation prior to the Funeral Service from 10:00 AM to 11:00 AM at the church. Relatives and friends are kindly invited to attend.  In lieu of flowers, donations in his memory may be made to St. Nectarios Greek Orthodox church. Burial in Forest Hills Cemetery, Boston, Massachusetts. Arrangements by Faggas Funeral Home, Watertown, Massachusetts.