From her obituary https://www.legacy.com/us/obituaries/greenbaypressgazette/name/leslie-trewyn-obituary?id=18565220

Leslie Trewyn (Christenson) born in 1941, died Thursday, March 9, 2017 at her home in Green Lake.

Raised in DePere, she graduated with a B.S. in Art Education from the University of Wisconsin, Madison. She married Tim Trewyn in 1963. They moved to Waupun where they both began their teaching careers. They built their home and raised their family on a small farm. For more than 50 years, she taught and also created art noted for colorful, distinctive acrylics based on her travels and readings. She exhibited in her studio, galleries, art fairs and museums, receiving many awards.