Niemczyk, Leo L. of Boston passed away peacefully surrounded by his loving family on April 4, 2023. Leo was born in Boston on September 27, 1938, the devoted son of the late Regina Niemczyk. He was the longtime companion of the late Patricia Wood. Loving father of Traci Appel and her husband Arthur of San Bernadino CA and Patricia, Patrick, Christine and Matthew Niemczyk. Loving grandfather of Ashli Keller and Joshua and his wife Sarah. Great-grandfather of Jaiden. Cherished brother of Theresa Hough and her husband Joseph of Avon and the late Robert Burkett. Dear uncle of Teresa Sheppard and her husband Eric and Joseph and his wife Tina Hough. Great uncle of Aiden Sheppard and Tessa and Tori Hough. Relatives and friends are kindly invited to attend visiting hours in the William J. Gormley Funeral Home, 2055 Centre Street, West Roxbury on Tuesday, April 11, 2023, from 4:00 p.m. to 7:00 p.m. Services for Leo will conclude with a service in the funeral home. Interment private. In lieu of flowers, donations in Leo’s memory may be made to the American Lung Association/National Direct Response, PO Box 756, Osceola, WI 54020-0756 or at ALA.org. For directions or to leave a condolence message for Leo’s family, please visit: gormleyfuneral.com.