John G. Maidoinis of Medford , March 24,2015. Beloved husband of the late Georgiana (Sperion) Maidonis. Beloved father of Victoria Giosmas and her husband James, George Maidonis and his wife Barbara, William Maidonis and his wife Nelly. Loving grandfather of Gianna Giosmas Munguia and her husband Xavier , Kristen Frias and her husband Michael and the late Rhonda Krauss. Great grandfather of Damon Munguia and Mason Frias. He is also survived by many nieces, nephews, relatives and friends here and in Greece. He is predeceased by his siblings. Funeral on Friday March 27th from the St. Athanasius the Great Greek Orthodox Church, 4 Appleton St., Arlington, MA at 10am . A visitation will be held one hour prior to the service from 9 to 10 am. Donations in John's memory may be made to the Hellenic Children's Cardiac Fund. Burial is private