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William Allyn Horin

William Allyn Horin obituary, Bethesda, MD

UPCOMING SERVICE

Funeral Mass

Oct. 4, 2025

11:00 a.m.

St. Bartholomew Church

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William Horin Obituary

Bethesda - William Allyn Horin, 70, passed away on July 10 surrounded by family after undergoing surgery to implant a left ventricular assist device (LVAD), a procedure he pursued with courage and hope in order to spend more time with his loved ones.

Born on August 21, 1954, in Piper City, IL, William was the son of Genevieve (Rohrer) Horin and William K. Horin. He spent his early years in Indianapolis, IN, where he worked in his father's shoe store, Youth House Shoes, alongside his brother Jonathan and sister Sarah. Summers were spent with extended family on their farm in Waverly, IL.

William enjoyed swimming, a passion sparked by time at The Riviera Club and later honed on the Brebeuf Jesuit Preparatory School swim team.

He attended Northwestern University in Evanston, Illinois, where he received his bachelor's and master's degrees in chemical engineering. He served for many years as an active member and former president of the Washington, DC, Northwestern Alumni Club.

William moved to Washington, DC, in 1976 to attend Georgetown University Law Center. There, he met his future wife, Dru Belmonte. At the time, Dru was interning for Edward W. Brooke, US Senator (MA). They were married 46 years and raised four children in Bethesda, MD.

William was a partner in the nuclear practice group at Winston & Strawn LLP for 44 years. Even after his retirement in 2023, he remained closely connected to his colleagues and the broader nuclear law community, including his leadership roles as a board member and past President of the International Nuclear Law Association (INLA).

William is predeceased by his parents and is survived by his wife Dru; his siblings Jonathan Horin (Shelly) and Sarah Reynolds (Tim); his children Colleen Lueken (Roger) of Arlington, VA, Cynthia Zingale (Robert) of Canton, MI, Adam Horin (Alex) of Chicago, IL, and Brett Horin (Anthony) of Chicago, IL; grandchildren Paul and Zoe Lueken, and by many beloved cousins, nieces, and nephews.

His funeral Mass will be October 4th 11 am, St. Bartholomew Church, River Road, Bethesda, Maryland.

To plant trees in memory, please visit the Sympathy Store.

Published by The Indianapolis Star on Sep. 1, 2025.

Memorial Events
for William Horin

Oct

4

Funeral Mass

11:00 a.m.

St. Bartholomew Church

River Road, Bethesda, MD

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