Regan, Mildred M. (Monahan), of Arlington, December 1st, 2017. Devoted mother of Elizabeth Trieshman, her husband Stephen, of Vineyard Haven, MA, Susan Regan, her husband Randy Elliot, of Berkley, CA, Dr. Thomas J. Regan, his wife Adine, of West Hartford, CT, Karen Regan of Greenfield, MA and Carolyn Regan of Belmont. Loving grandmother of Lagan and Shawn Trieshman, Drake and Rory Elliot, Erin, Cailyn and David Regan. Sister of Patricia Szostak of Exeter, NH, Anne McCarthy of Manchester, NH, and the late Kathy, Eugene and William Monahan. Funeral from the Keefe Funeral Home, 5 Chestnut St. (adjacent to St. Agnes Church, Rt. 60) ARLINGTON, Saturday, December 9th at 9 AM. Followed by a funeral mass celebrated in St. Agnes Church, Medford St., Arlington at 10 AM. Relatives and friends are respectfully invited to attend. Visiting hours Friday 5 - 8 PM. Services will conclude with burial at St. Patrick Cemetery, Watertown. Memorial contributions can be made in Millie's name to the Arlington Historical Society, Salvation Army or Care Group Parmenter Home Care, 330 Mt. Auburn St., Cambridge, MA 02138. For directions or to send a message of condolence, please visit www.keefefuneralhome.com.