Nancy L. (Regan) Callahan, 75, of Hingham, passed away peacefully at home on September 10, 2025, surrounded by her loving family, after courageously living with Parkinson’s disease for nine years.
Born in Boston, Nancy was the daughter of the late John X. and Katherine F. (McCarthy) Regan. She grew up with her four siblings in Dorchester, where she attended Saint Gregory’s schools. Following high school, Nancy attended Aquinas College, where she studied business and formed lifelong friendships. From an early age, Nancy had a passion for fashion, and following college pursued a career in apparel sales.
Nancy leaves behind her devoted husband and best friend, Dennis Callahan of Hingham. The two were high school sweethearts and, after 54-years of marriage, anyone who knew them could see that they were truly still in the honeymoon stage. The love they share is special and everlasting.
Once married, Dennis and Nancy moved to Hingham to raise a family. Nancy was a doting mother and centered her life around her three children’s academics, athletics, and personal lives, taking great joy in witnessing their successes.
She enjoyed traveling, especially to Cape Cod and Nantucket, and when not on vacation or “an adventure”, was happiest relaxing at home surrounded by family and friends. Nancy was an exceptional hostess; she found great pleasure in opening her home to others and made every gathering special from large, boisterous Callahan-Regan holiday celebrations to afternoon refreshments on the deck.
In recent years, Nancy’s greatest passion was her role as “Nana Nancy” to her eight adoring grandchildren; Maeve, Harrington (Harry), Shae, Thomas, Charlotte, Wyatt, Molly, and Dennis.
Nancy was the loving mother of Matthew Callahan and his wife, Kathryn, of Westwood, Brian Callahan and his wife, Laura of Scituate, and Abby Callahan of Hingham. She was a loyal sister to John X. Regan and his late wife, Martha of Boston, the late Kathleen McCann and her surviving husband, William of Hingham, the late Mary Critchlow and her surviving husband, David of Cornelius, North Carolina, and the late Jane Donovan and her surviving husband, John of Scituate.
Nancy is survived by many nieces, nephews and dear friends.
Nancy was effortlessly beautiful, gently opinionated, and fun to be around. She will be greatly missed by all who were lucky enough to know her.
In lieu of flowers, donations in memory of Nancy may be made to Norwell VNA and Hospice, 120 Longwater Drive, Norwell, MA 02061 or to the Parkinson’s Foundation, P.O. Box 61420 Staten Island, NY 10306
Relatives and friends are respectfully invited to greet the family during the visiting hours on Sunday, September 14th from 3:00-6:00 PM in the McDonald Keohane Funeral Home, South Weymouth, 809 Main Street (Rt.18 opposite South Shore Hospital).
A Funeral Mass will be held on Monday at 10:30 AM at St. Paul’s Church, 147 North Street, Hingham, MA.
To order memorial trees or send flowers to the family in memory of Nancy L. Callahan, please visit our flower store.
I was around 58 when my thumb started giving me problems. As time passed, I had other symptoms: hand tremors, restless sleep, muscle weakness, cognitive decline, voice spasms, and a stiff, achy right arm and ankle. At 60 I was diagnosed with PARKINSON’S DISEASE. I was on Carbidopa and Pramipexole for two years; they helped a lot but not for long. As the disease progressed, my symptoms worsened. With my neurologist’s guidance, I started on PD-5 treatment from U.H.C. (Uinehealth Centre). The treatment worked very effectively; my severe symptoms, especially the tremors, simply vanished. I feel better now than I have ever felt, and I can feel my strength again. Visit Uine healthcentre. n e t. My neurologist was very open when looking at alternative medicines and procedures; this PD-5 treatment is a breakthrough