William was a high school graduate and went on to earn a master's degree, reflecting a lifelong commitment to learning and personal growth.
William enlisted in the United States Air Force in 1959 where he honorably served four years. Later he dedicated himself to education, teaching high school as well as at Fresno City College. His work was marked by diligence, discipline, and a sincere respect for others. William was an iron worker during his college and military years as well as during the summer break while he was teaching.
He is survived by his wife of 56 years, Rae Dennison of Tollhouse, California; daughters, Tammy Jumah of Lee's Summit, Missouri, and Melissa Singer Rice (Rick) of Shaver Lake, California; and son, Michael Dennison (Tami) of Tollhouse, California. He is also survived by his grandchildren: Leena Jumah of Lee's Summit, Missouri; Reema Aj (Shadi) of Riyadh, Saudi Arabia; Rod Jumah (Morgan) of Overland Park, Kansas; Courtney Dennison of Tollhouse, California; Stephan Dennison (Emily) of Clovis, California; Nicholas Dennison (Anna)of Clovis, California; Annie Baker (Clint) of Fresno, California; Kasey Paul (Russell) of Clovis, California; and Denton Miniajluk of Atascadero, California. He is further survived by his brother, John Dennison (Karen) of Lakeside, Arizona. A blessed great-grandfather of 13.
He was preceded in death by his daughter, Karen Dennison; his sisters, Barbara Bayus and Norma Dennison; his sons-in-law, Ahmed Jumah and Scott Singer; and his parents, John Henry and Callie India (Marchman) Dennison.
An accomplished hiker, William mastered Mt. Whitney and Half Dome numerous times and hiked the John Muir Trail—pursuits that reflected his adventurous spirit and the quiet confidence with which he met challenges.
William was also a member and on staff of the Sierra Foothill Conservancy, giving his time and support to causes that mattered to him and to the land he valued.
William’s life was defined by service, perseverance, and a quiet sense of humor that brought warmth to those around him. His legacy lives on in the family he loved, the students he taught, and the trails and peaks that forever bear the imprint of his adventurous heart.
