Kaloostian, Gladys (Dagavarian), 92, of Waltham, passed away peacefully on January 22, 2021. Loving wife of the late George Kaloostian. Devoted mother of Joan Gallivan and her husband Mike of Byfield, MA and Ken Kaloostian and his wife April of Haverhill, MA. Loving grandmother of Meredith Gallivan and her partner Jacobi Ayala of Des Moines, IA, Paige Gleason and her husband Adam of Thornton, CO, Olivia Gallivan and her partner David Cotton of Lebanon, ME and Emma Kaloostian and Harry Kaloostian of Haverhill, MA. Cherished greatgrandmother of Avery Gleason and Lila Ayala. Also survived by many loving nieces, nephews and cousins. She was predeceased by her brother Charles Dagavarian and his wife Helen; cousin Beatrice Ohannessian and her husband Andy and cousin Anita Der Minasian and her husband Harry. Funeral and cemetery services will be private. Due to the ongoing Covid-19 pandemic, current public health and safety measures will be followed. Social distancing and facemasks will be required for everyone’s safety. In lieu of flowers, donations may be made to Macular Degeneration Research, 22512 Gateway Center Drive, Clarksburg, MD 20871.