Tammy A. Williams

Tammy A. Williams, age 61, of Sheboygan passed away surrounded by her family on Friday, October 3, 2025.

She was born in Chilton, WI on June 23, 1964, to Joseph and Valonn (Valleskey) Lettenberger. She graduated from Green Lake High School. Tammy was employed at HSA Bank for over 15 years, before her retirement in 2022. On July 31, 2020, Tammy married the love of her life, Alan Dekker, after being together for 28 years. He preceded her in death on March 12, 2021.

Tammy enjoyed many outdoor activities such as gardening, boating, fishing, and golfing. She also loved cooking and experimenting with cooking. Tammy was a strong believer in Christ and enjoyed her daily bible scriptures. Above all she loved being Grammy Tammy.

Tammy is survived by her children, Zachary (Ashley) Williams and Phaedra (Matthew) Wolf; step-son, Alan Dekker; her parents, Joseph and Valonn Lettenberger, and sister Michelle (Darren Helgesen) Voigts; grandsons, Shane, Jordan, Alexander, Mathew, Wyatt, Sebastian, and Jaxson. As well as many other relatives, nieces, nephews and friends.

Along with her husband, Alan, Tammy was preceded in death by her sister Lynda Bergemann, mother-in-law Carol Dekker and father-in-law Robert Dekker.

A Celebration of Life for Tammy will be held on Friday, October 17, 2025, from 11:00 AM until 2:00 PM, at Ballhorn Chapels Funeral & Cremation Care Center, 1201 N 8th St. in Sheboygan.

A memorial fund has been established in Tammy’s name.

The family would like to thank the staff within the Sheboygan Internal Medicine Associates for the excellent care given to Tammy.