Agnes diZerega Cook - Di to her friends - passed away peacefully at her home, Rock Spring Farm in Leesburg, VA on April 23, 2025. Born to the union of Alfred L.B. diZerega II and Lucy Harrison diZerega on June 30, 1936, also at Rock Spring Farm.

In 2019, Di was honored by the Loudoun Laurels Foundation in recognition of her devotion to Loudoun County through decades of volunteer work. Loudoun Laurels summarized her work when she was named a recipient of the Loudoun Laurels medal:

"Di Cook is a creative genius whose service to non-profit organizations in Loudoun County and all over the world has impacted on the lives of countless children, veterans, and their families, as well as supporters of the arts. Through her family foundation she supports organizations that provide food, health care and training to Loudoun County residents with the greatest need for life sustaining services. Di is passionate about art and floral design. For more than 20 years, she has played leadership roles in organizations that support local artists and artistic projects, garden clubs and flower shows in our community and throughout the Commonwealth of Virginia. She is humble beyond belief, often working behind the scenes to ensure the success of an artist's exhibit, a symphony performance, a flower show, or a community event.

When Di served on the board of directors of The George C. Marshall International Center, she led the effort to engage the Garden Club of Virginia in creating a plan for the restoration of Dodona Manor's garden and grounds to their appearance during the years in which the Marshalls lived in Leesburg. During her years of service on the board of directors of Morven Park, our community benefitted from educational programs and events that increased tourism and enhanced visitors' knowledge of the Loudoun County's rich history. Di also was instrumental in involving the Garden Club of Virginia in the design and implementation of the plans for Morven Park's gardens and grounds. She also served as president of the Loudoun Arts Council.

Di served in leadership positions in The Leesburg Garden Club and the Fauquier and Loudoun Garden Club, encouraging her fellow members to join her in giving of their time, talents, and financial resources to showcase gardens and floral designers in Leesburg, Loudoun County, and the Commonwealth of Virginia. She chaired the annual historic garden week tour which brought thousands of visitors from all over the country to Loudoun County, boosting tourism and creating opportunities for children, adults, and seniors to enjoy the bounty of our community's gardens."

Di was preceded in death by her siblings, Florence, Lucy, and Alfed. She is survived by her husband of 68 years, Jack; daughter, Liza; sons, John and Harrison; and grandchildren, Jack, Maverick, James, Hollyn, and Nate.

Services will be at St. James Episcopal Church in Leesburg at 10 AM on Saturday, May 17. She will be laid to rest in the Harrison family area at Union Cemetery, Leesburg, VA.