OLSEN— Dennis, Age 88, of Port Washington, passed on August 16, 2016. They Shall Not Be Forgotten. Proud Korean War Veteran. United States Army. Beloved husband of Magda. Adored father of Gregory (Christine) and Daniel (Jennifer). Cherished grandfather of Rudy, Derek, Jake and Brooke. Funeral Mass was celebrated at Sts. Philip & James R.C. Church in St. James. Cremation was private. Arrangements entrusted to the professional care of The Branch Funeral Home Smithtown and Vigliante family. Online guest book at www.branchfh.com