Add a Memory
Send Flowers
Make a Donation
Otto "Sonny" Mraz Obituary
Otto “Sonny” Mraz, age 87, passed away at his home in Appleton on June 23, 2025. Sonny was born May 27, 1938, son of the late Otto and Adeline (Becker) Mraz. Otto was a union steamfitter forty-three years, working out of Local 206 in Fond du Lac and later Local 400 out of Kaukauna. He traveled to many states with his work, but his favorite was Alaska. After his retirement from steam fitting, he had a small business mowing lawns and snow removal. He enjoyed his time at the cottage in Door County and enjoyed his McDonald’s morning coffee with his buddies who have already passed away.
Survivors include his wife: Marlene Mraz; brothers Eugene (Karen) Mraz, LeRoy (Barb) Mraz, and Kenny Mraz; a son Mark Mraz and a daughter Michelle Mraz; a stepson James (Wendy) Walker; a step-granddaughter Stephanie (Jonathan) Gast, and two step-great-grandchildren James and Randi Gast. Sonny also has many grandchildren from a previous marriage.
He was preceded in death by his parents, a son Darrin, and a stepdaughter Cindy.
Otto’s wishes were to be cremated with no formal service. His urn will be placed at Highland Memorial Park.
The family would like to thank all of Otto’s nurses and physicians, the entire ThedaCare Hospice team, as well as Cherry Meadows Hospice for their great compassion and care.
To plant trees in memory, please visit the Sympathy Store.
People and places connected with Otto "Sonny"
Recent Obituaries
Memories and Condolences
for Otto "Sonny" Mraz
Tell your own story about Otto "Sonny"
Memories and condolences can be left on the obituary at the funeral home website.
How you can show support
Send flowers
Consider sending flowers.
Add photos
Share their life with photo memories.
Plant trees
Honor them by planting trees in their memory.
Follow this page
Get email updates whenever changes are made.
Donate in Memory
Make a donation in memory of your loved one.
Share this page
Invite other friends and family to visit the page.
Make a Donation
in Otto "Sonny" Mraz's name
How to support Otto "Sonny"'s loved ones
Honor a beloved veteran with a special tribute of ‘Taps’ at the National WWI Memorial in Washington, D.C.
The nightly ceremony in Washington, D.C. will be dedicated in honor of your loved one on the day of your choosing.
Read more
Should I Send Sympathy Flowers?
What kind of arrangement is appropriate, where should you send it, and when should you send an alternative?
Read more
What Should I Write in a Sympathy Card?
We'll help you find the right words to comfort your family member or loved one during this difficult time.
Read moreResources to help you cope with loss
Estate Settlement Guide
If you’re in charge of handling the affairs for a recently deceased loved one, this guide offers a helpful checklist.
Read more
Obituaries, grief & privacy: Legacy’s news editor on NPR podcast
Legacy's Linnea Crowther discusses how families talk about causes of death in the obituaries they write.
Read more
The Five Stages of Grief
They're not a map to follow, but simply a description of what people commonly feel.
Read moreWays to honor Otto "Sonny" Mraz's life and legacy
Obituary Examples
You may find these well-written obituary examples helpful as you write about your own family.
Read more
Obituary Templates – Customizable Examples and Samples
These free blank templates make writing an obituary faster and easier.
Read more
How Do I Write a Eulogy?
Some basic help and starters when you have to write a tribute to someone you love.
Read more
