Mary Lynn Llewellyn

Mary Lynn Llewellyn, age 81, of Oshkosh, passed away peacefully at home on May 26, 2026, with her family by her side. She was born to Joseph Baumann and Lila (Stedl) Baumann on December 23, 1944.

Mary graduated from Denmark (Wis.) High School in 1963. She went on to earn her registered nursing degree from Mercy's School of Nursing in 1966. She began her career in the emergency room at Mercy Medical Center in Oshkosh, Wis., where she worked for 35 years. She later continued her work in the emergency department at Ascension Calumet Hospital (Wis.) for an additional 10 years.

Throughout her career, Mary explored many areas of nursing. She helped open the first ICU unit at Mercy Hospital and was part of the team that launched its first open heart program. Her work also included urgent care, home health care, and ambulance transport. Her love of travel led her to participate in medical mission trips to Haiti and Guyana, and she also served as a cruise ship nurse. Mary was an officer in the Mercy Alumni Association and supported membership recruitment for the 25-Year Club.

After retirement she generously gave her time through volunteer work at Father Carr's and the St. Francis Community Clinic.

Mary enjoyed crafting, knitting, sewing, traveling, working in her yard and spending time with her grandchildren,

She is survived by her sons, Nathian (Denise) Llewellyn and Adam (Cindy) Llewellyn; her daughter, Annie (Heath) Feavel; and her grandchildren, Roy Llewellyn, Ben Llewellyn, Ashley Canafax, Oliver Feavel and Theodore Feavel.

Mary was preceded in death by her brothers, William Baumann and Thomas Baumann.

A Funeral Mass will be held at St. Raphael the Archangel Catholic Church (830 S Westhaven Dr, Oshkosh, WI 54904) on Friday, July 31, at 12 p.m. with a luncheon to follow. A Visitation and a Nurses Honor Guard (11:45 a.m.) will be held at the church from 10:30 a.m. until 12 p.m.

The family would like to thank Compassus Hospice and Tanya for their compassionate care and support.

Memorials may be directed to Father Carr's Saint Francis Free Clinic. https://fathercarrs.org/free-clinic/