Grim's father, and Joseph, who was the father of Mildred Natwick, Grim's first cousin.

Natwick had his nickname since before high school as a takeoff on his "anything but Grim" personality. He was well known even in high school for his artwork and his poetry. Although never published, many pages of his poetry were displayed in the summer of 2011 at the South Wood County Historical Museum in Wisconsin Rapids, Wisconsin, where there was a permanent exhibit of Natwick's works. His brother Frank was