A photo of Jeff Monreal, owner and operator of Jeff Monreal Funeral Homes posing in a black suit with no background

Painesville Location

1000 Mentor Avenue Painesville, Ohio 44077

Willoughby Location

38001 Euclid Avenue Willoughby, Ohio 44094

Mentor Location

6330 Center Street Mentor, Ohio 44060

John J. Gruenberg

3/28/1964 - 9/16/2023

John J. Gruenberg, age 59 of Mentor, passed away September 16th, 2023. He was born March 28th, 1964 to the late Ray Gruenberg and Patricia Nelson.

John was self employed and owner of City Marine Inc. in Eastlake.

John had the greatest sense of humor, was a hard worker and a straight shooter. John’s gregarious nature, intense curiosity and ability to jump in and help so many in the neighborhood and community will be missed by all. He was a friend of Bill W.

John was the loving husband of 34 years to Amy K. Gruenberg (nee Caldwell); dearest brother of  Mark (Amy) Gruenberg, Andy (Rachel) Gruenberg and the late Mary Ann Riddle; brother in law of Karen Caldwell (Eric Snead), and Becky (Steve) Belechak; uncle and great uncle of many.

The Gruenberg family will receive friends from 1:00 – 5:00 PM Saturday, November 11th, 2023 and a Celebration of John’s Life will be held at 4:30 PM at Jeff Monreal Funeral Home, 1000 Mentor Ave., Painesville OH 44077.

Donations can be made in John’s name to The Lake Humane Society, www.lakehumanesociety.salsalabs.org/donate/index.html

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14 Replies to “John J. Gruenberg”

  1. I loved John for many reasons but most of all was his sense of humor. His laugh was infectious. His knowledge of the boating world was invaluable when a problem with my boat left me stumped. I miss him now but have him in my heart ❤️


  2. To Amy and family our deepest condolences Will remember john as a fun loving person who helped many. our golf trips to santee bring back good memories and lots of laughs


  3. John was inspirational in changing my life for the better. Thanks, John


  4. John was my friend for 20+ years. We travelled the road together and had many laughs and Dairy Queen treats. He helped me with projects around the house and always had time for me. I miss him and he will always be in my heart.


  5. John was a great friend! He will be missed! Rest easy my friend. Love you! Amy you are in my thoughts and prayers!


  6. John you will be missed! Rest easy my friend you are loved! Amy you are in my thoughts and prayers.


  7. “Johnny Boats” , as he is affectionately known in our house , had helped me tremendously since me and my wife became boaters . He will be missed by many . My deepest sympathies to Amy! I am very saddened to hear about this .


  8. My neighbor, friend, and favorite Longos dinner partner and floating out in the water behind the boats cooling off buddy. You were my go-to guy for “how to” questions google couldn’t answer for me. You said the things I was thinking of so often, I thought we were long lost brothers. I’m so lucky that fate brought us together as neighbors and friends. I miss you John!


  9. Amy & Family,

    My prayers go out to all of you. John was a unique guy in a thousand ways. He touched our family like no other and will miss and cherish the memories we have of him. I have been blessed knowing John for the years we had together.

    I remember dropping off the masks I made for you “three” during Covid. I did a little dance for your Ring doorbell when you weren’t home. John called me later and said he just put it in and he laughed when he saw me, I was the first one to be seen on the camera!

    God’s blessing to all ~ Lovingly, Diane Hirko


  10. Our heart and prayers go out to Amy and John’s family. He will be greatly missed!


  11. LuAnn Rihaly and George Hoyt September 21, 2023 at 10:20 pm

    Amy and family. We just heard of John’s passing and are so very sorry! We’ve considered John a friend since the first day we met. I was so happy when he bought the marina. He was so much like my husband and brother. I can honestly say I know how much you are hurting right now. You are in our prayers and thoughts. God Bless ❤️


  12. Larry & Margo Schwenk September 22, 2023 at 1:22 am

    Dear Amy and family, our thoughts and prayers are with you at this time. John was a special man always there to help and answer questions. John will be head boat mechanic in heaven.


  13. Amy, I am so sorry for your loss. You have a long road ahead of you as I did, but you will make it with the help of your family and great friends. Bless you.


  14. Robert Hanratty Jr ✝️ November 3, 2023 at 12:31 pm

    John has impacted many. Through pain their is pleasure, through salutation, there is Grace. Above all He will be missed Dearly. Rest Easy My Friend.


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