Cover photo for Michael Brosteau's Obituary
Michael Brosteau Profile Photo
1941 Michael 2024

Michael Brosteau

April 5, 1941 — March 8, 2024

Michael R. Brosteau, of De Pere, passed away on March 8, 2024, surrounded by his loving family. He was born April 5, 1941, in Green Bay, to the late Harold and Eleanor (Bowers) Brosteau. He attended Premontre High School in Green Bay and graduated from UW-Whitewater. Michael spent most of his career at KI, he was a dedicated, hard-working man that many looked up to.

Michael married Bonnie Smits on April 4, 1964, at St. Mary Catholic Church of De Pere. They celebrated 50 wonderful years together, along with their two children and families, before her passing in 2014. He loved spending time with his grandchildren, traveling, and relaxing at his winter home in Florida. Mike spent many weekends up north in Minocqua driving his boat, fishing, and enjoying time with friends and family around the campfire sipping a martini. Mike always had a smile on his face. If he was not spending time with loved ones, Mike could be found on the golf course or cruising in his red golf cart around The Villages. Although we are saddened by his passing, we can smile knowing he is now playing the fairways in heaven with his loving wife.

He is survived by two children and their families: Scott (Mary) Brosteau and children: Mitch Brosteau, and Kirstyn (Isaac) Guyette; Amy (Tim) Grovogel and children: Kennedy (Shawn) Grovogel-Prokash, and Sawyer Grovogel; a brother: Tom (Bonnie J.) Brosteau; sisters-in-law: Mary Kay Gabriel and Sandy Smits; a brother-in-law; Ronald Blohowiak; as well as other family members.

He was preceded in death by his loving wife: Bonnie (Smits) Brosteau and his parents, Harold and Eleanor; his father-in-law and mother-in-law, Harold and Irene Smits; sister: Kay Blohowiak; and brothers-in-law: Tom Smits and Chuck Gabriel.

Family and friends may visit Cotter Funeral Home, 860 N Webster Ave, De Pere, on Friday, March 15, from 11:00am until the time of service at 1:00pm with the Rev. Mike Ingold officiating. Entombment will be in Allouez Chapel Mausoleum.

In lieu of flowers, memorials may be directed to the Alzheimer's Association.

Special thank you to the staff of Rennes Group, St. Vincent Hospital (ICU, ICUM, 9th floor) and Unity Hospice for the exceptional care shown to Michael and his family.

To order memorial trees or send flowers to the family in memory of Michael Brosteau, please visit our flower store.

Service Schedule

Past Services


Friday, March 15, 2024

11:00am - 1:00 pm (Eastern time)

Enter your phone number above to have directions sent via text. Standard text messaging rates apply.

Prayer Service

Friday, March 15, 2024

Starts at 1:00 pm (Eastern time)


Click to watch

Enter your phone number above to have directions sent via text. Standard text messaging rates apply.


Visits: 2

This site is protected by reCAPTCHA and the
Google Privacy Policy and Terms of Service apply.

Service map data © OpenStreetMap contributors

Send Flowers

Send Flowers

Plant A Tree

Plant A Tree