Theresa Ann O'Regan, 62, of West Islip, Long Island, New York. Beloved wife of the late Michael O'Regan. Cherished daughter of the late William and Patricia Beyerbach. Dear sister of Elizabeth, Marie, Billy, Susan, Kathleen, Patti, Alice, Barbara and the late Margaret. Also survived by twenty-nine loving nieces and nephews and eighteen great-nieces and nephews. Mrs. O'Regan's Funeral Mass will be celebrated on Wednesday, February 19, 2020, 10:30am, at Our Lady of Lourdes Roman Catholic Church, 455 Hunter Avenue, West Islip, New York. Committal prayers and interment will follow at Pinelawn Memorial Park, Farmingdale, New York at 12:00pm. www.boyd-spencerfuneralhome.com.