Kathleen R. Yonkman Obituary
It is with great sadness that we announce the death of Kathleen R. Yonkman of Saint John, Indiana, who passed away on September 14, 2025, leaving to mourn family and friends. Leave a sympathy message to the family on the memorial page of Kathleen R. Yonkman to pay them a last tribute.
She was predeceased by: her husband John Yonkman; her parents, John Koenes and Elsie Koenes; and her sister-in-law Ruth Boer (late Henry). She is survived by: her children, Brian Yonkman (Cynthia), Diane Siersema (David), Debra Heersema (Scott) and Scott Yonkman (Lynnette); her grandchildren, Daniel Siersema (Carrie), Laura Mulder (Philip), Matthew Yonkman (Ginnette), Elizabeth Sitter (David), Andrew Siersema (Cassandra) and Steven Yonkman (Allison); and her siblings, Leonard Koenes (Carol) and Anna Jean Porte (late Harold).
In lieu of flowers, contributions can be made to the First PCA of Lansing, IL, or to a cause of your choice.
