Peter G. Koutrakis, 86, of Littleton, Mass., formerly of Arlington, MA, passed away on February 10, 2021. Son of the late George and Irene (Koutoulakis) Koutrakis. He was born in Cambridge, Mass.  He entered the US Army at the age of 19.  He met and married the love of his life, Mary E. (Allen) Koutrakis.  He worked as a principal engineer at B.R.+.A.  He enjoyed spending time with his family, especially his two granddaughters, Lexi and Christina Welsch. He was an avid football fan and loved a good debate, talking politics.  He was predeceased by his wife of 54 years,  Mary E. (Allen) Koutrakis. He is survived by his daughter Irene E. Welsch and her husband Joseph, and his granddaughters, Lexi Welsch and Christina Welsch. Brother of the late Emmanuel Koutrakis, and the late Marie Stennes. He is also survived by many relatives and friends.  Funeral Service will be held on Friday, February 19, 2021 at the Taxiarchae Greek Orthodox Church, 25 Bigelow Avenue, Watertown, MA at 10AM.  Visiting hours will be held on Thursday, February 18, 2021 at the funeral home from 4PM to 6PM.  Relatives and friends are kindly invited to attend.  In lieu of flowers, donations in his memory may be made to the above named church.  Burial in Mt. Pleasant Cemetery, Arlington, MA.  Late Veteran US Army.