Mary Klassa, who lived in Montauk as a girl and attended South Fork schools, died on April 3 at Garden City Hospital in Michigan following a stroke. She was 64.
She was born Mary Alice McGuire on June 29, 1949, at Southampton Hospital, to William McGuire and the former Eva Holmes.
After her father’s death in 1953, she and her sister Jeannette went to live with an aunt and uncle, Kathryn and James McDonald. She attended St. Therese of Lisieux Catholic Church’s Little Flower Day School in Montauk, then Sacred Heart Academy in Sag Harbor, from which she graduated in 1967.
She worked in several places in Montauk as a young woman, including John’s Drive-In and the Montauk I.G.A.
Her first marriage was to Dennis Pickle. After they divorced, she moved to Michigan in 1973, staying with friends. She went to work at Holcroft, an industrial equipment manufacturer, and met Ralph Klassa, whom she married. Mr. Klassa died in 2003.
Her sister Jeannette Rucano of East Hampton, who is known as Nettie, visited her many times over the years. They would spend hours talking about their memories of growing up in Montauk, said Ms. Rucano. She said her sister liked to knit and crochet in her spare time.
A brother, William McGuire, and a sister, Rose Marie, died before her, as did the McDonalds. In addition to Ms. Rucano, several nieces and nephews survive. She was very close to her niece Kathleen Rucano of East Hampton and her nephews Peter Rucano Jr. of Montauk and Douglas Rucano of Sound Beach. She had no children of her own.
She was cremated, as was her husband. No service has been announced.