Cynthia M. (McMahon) Clancy of Marion, a lifelong summer visitor to the Vineyard, died August 5 at home after a lengthy battle with ovarian cancer. She was 70 and the wife of Robert P. Clancy.

She was born in Boston and lived in Arlington, Boston and Wayland before moving to Marion in 2011. She graduated from Tufts University, Northeastern University and Lesley University.

She was the granddaughter of Joseph A. Sylvia, a longtime Oak Bluffs selectman and state representative who owned the Ocean View Hotel for many years before it was destroyed in a fire in the mid-1960s. Joseph A. Sylvia State Beach was named after him.

Cindy’s mother, Catherine Sylvia McMahon, was born and raised on the Island. The family spent summers on the Island in Oak Bluffs and East Chop, spending time at the East Chop Tennis Club and Beach Club.

Cindy continued visiting the Island with her family until her death.

She is survived by her husband, Robert P. Clancy; her son, Steven J. Clancy of Chappaqua, N.Y.; her daughter, Christine Clancy of Copenhagen, Denmark; her brother, Thomas McMahon of Lynn; her sister, Jill McMahon of Centennial, Colo.; and her grandchildren, Liam and Bryn Clancy.

Her funeral was held at 9 a.m. on Wednesday, August 10 at Chapman Cole and Gleason Funeral Home in Wareham, followed by a Mass of Christian Burial at St. Rita’s Church in Marion.

In lieu of flowers, donations in her memory may be made to Southcoast VNA, 200 Mill Road, Fairhaven, MA 02719 or Clearity Foundation, 4365 Executive Dr., Suite 1500, San Diego, CA 92121.