William Daniel Duncan

1941 - 2026

William Daniel "Dan" Duncan, 85, of Libertytown, passed away peacefully on Friday, March 27, 2026, at Heartfields Assisted Living in Frederick.

Born on March 18, 1941, in Washington, D.C., he was the son of the late Carl Henry Duncan and Gertrude Lorraine Joy Duncan. He was the devoted husband of Earlene Rae Duncan, who preceded him in death in 2018.

Dan is lovingly remembered by his children and spouses: Mark Daniel Duncan and Mindy, Paul Henry Duncan, Matthew David Duncan and Karen, Alecia Marie Biddinger and Howard, Raymond Kiddy and Sarah, Kevin Kiddy and Kirstin, and Melanie Shelton and Jim. He is also survived by his siblings and spouses: Joyce Offutt and Roland, Carl Duncan Jr. and Rosalie, Mary Brandt, and Michael Duncan. Dan leaves behind a cherished legacy in his 20 grandchildren and many great-grandchildren, along with a large extended family.

In addition to his parents and wife, he was preceded in death by his granddaughter, Rachel Ault, and his brother-in-law, Jim Brandt.

Dan proudly served his country in the United States Army for nearly a decade, including time stationed in Germany. Following his military service, he enjoyed a long career with Bell Atlantic, formerly C&P Telephone, retiring prior to its transition to Verizon.

A member of St. Peter's Catholic Church in Libertytown, Dan was known for his generosity and willingness to give both his time and resources to others. He volunteered with the Mountain State Railroad and Logging Historical Association, where he took great pride in helping restore Climax locomotives. In his leisure time, he found joy in traveling, gardening, tending to his fish pond, tinkering, and, most especially, spending time with his beloved grandchildren.

A visitation will be held at Hartzler Funeral Home-Libertytown, 11802 Liberty Road, Frederick, on Tuesday, March 31, from 2:00 to 4:00 p.m. A Mass of Christian Burial will be celebrated on Wednesday, April 1, at 11:00 a.m. at St. Peter's Catholic Church, 9201 Green Valley Road, Union Bridge, with Fr. Chuck Wible as the celebrant. Interment, with military honors, will follow at Resthaven Memorial Gardens in Frederick.

In lieu of flowers, memorial contributions may be made to a charity of one's choice.

Condolences may be shared with the family at hartzlerfuneralhome.com. William Daniel Duncan