Marianne Siwek Mulligan, R.N.

Marianne Siwek Mulligan, R.N., 72, of Marco Island, Florida, formerly of Harrison and Point Pleasant, New Jersey.

Marianne “went home by the waterside to rest her bones, listening to the river sing sweet songs, to rock her soul” on May 16, 2026.

The funeral will be conducted from the Mulligan Funeral Home on Thursday, May 21, at 9:30 a.m. A Funeral Mass will be offered at Holy Cross Church at 10:30 a.m. Entombment will follow at Holy Cross Chapel Mausoleum. Friends and relatives of Marianne and her family may visit the funeral home on Wednesday, May 20, from 2:00 to 4:00 p.m. and 7:00 to 9:00 p.m., and on Thursday morning after 9:00 a.m.

She was the loving daughter of the late Stanley J. Siwek, M.D., and Catherine Siwek, R.N. (Caprio). She is survived by her devoted husband, Frank X. Mulligan Jr.; her loving children, Frank X. Mulligan III and Michelle Haney; her cherished grandchildren, Reece Xavier, Bridget, Abigail, and Lucy; her beloved siblings, Kathryn Landau, R.N., and her husband, Irwin, M.D.; Jay Siwek, M.D., and his wife, Linda, R.N.; Patricia Jack and her husband, Jesse; and her late brother, Robert Damien Siwek. She is also survived by her adored nieces and nephews, Jaime, Amy, Erin, Lauren, Kathryn, Mary, Jennifer, David, and the late Mark; and by her grandnieces and grandnephews, Macy, Hadley, Colton, Cole, Henry, Tessa, and Athena.

Marianne graduated from the University of Colorado Boulder with a bachelor’s degree in Anthropology and later earned a Bachelor of Science in Nursing from SUNY College at Stony Brook, N.Y.

She began her nursing career at Montefiore Medical Center in the Bronx. She later worked at Kaiser Permanente in Hawaii, though the majority of her distinguished nursing career was spent as a critical care nurse in the Open Heart Surgery Unit at Passaic General Hospital in Passaic, New Jersey. Toward the end of her career, she served as a public health nurse for the Town of Harrison.

Marianne was a proud member of the Marco Bay Yacht Club and cherished every moment spent boating with Frank. She loved Mahjong, Canasta, traveling, live music, and, above all, time spent with family and friends. Brilliant, spirited, and endlessly compassionate, Marianne possessed a magnetic personality that drew people to her instantly. She had a remarkable way of making others feel seen, valued, and deeply loved, and her laughter and light filled every room she entered. Her presence made life richer for all who knew her. Selfless and gracious, the world was truly a better place because of Marianne’s presence. Her life was a beautiful example of love, kindness, and generosity lived through action every single day.

For those desiring, memorial contributions may be made to the Harrison Cancer League, the Cancer Research Institute, or VITAS Healthcare Hospice, in care of the funeral home, in loving memory of Marianne.

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