Kathy Sieben

July 13, 1955February 2, 2019
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It is with sadness and heavy hearts that we announce the passing of our beloved wife, daughter, sister, aunt and friend, Mrs. Kathleen “Kathy” Sieben. She passed away the afternoon of February 2, 2019 in Orange, California from a traumatic brain injury and complications resulting from a fall she sustained on January 26, 2019. Kathy was a beloved wife, daughter, sister and aunt. Kathy was born July 13, 1955 in La Jolla, California to Esther Imogene Bakes and Marcel Antonio Joseph Gauthier. She graduated from Claremont High School in Claremont, California in 1973. She went to California State University Long Beach and received her Degree in Business and Merchandising in 1978. She was a member of the Delta Delta Delta National Sorority. She started her career working as a Buyer at Buffum’s Department Store in Long Beach, CA. She then transitioned into the high-tech electronics industry as a sales representative and worked in that field for approximately fifteen years. In recent years Kathy worked at the Jewelry Box of Lake Forest, California. On October 12, 1985 she married the love of her life, Dan Sieben. They were wed in Southern California. They started their married life in Huntington Beach, California and then moved to Lake Forest, California. Kathy has no children of her own but was the best Aunt to niece Candice and nephew Christopher anyone could ever have. Kathy dearly loved her pets and was the best “doggie” mommy ever. Kathy enjoyed family gatherings and traveled the world with family. She had a special love of the Hawaiian Islands and traveled there over 30 times. She loved the Aloha spirit. She was a very generous loving person, always thinking of others and would do anything to help family and friends. She had such a deep loving, caring devotion of family and friends and in turn she was loved by all. Kathy is predeceased by her Father, Marcel Antonio Joseph Gauthier and her Auntie, Virginia Kennedy. She is survived by her husband Dan Sieben of Lake Forest, California and their dog, Koa; mother Esther Gauthier of West Covina, California; her sister Judy Cooper of Yorba Linda California and her husband Thomas Cooper; her niece Candice Cooper of Yorba Linda, California and her nephew Christopher Cooper of Fullerton, California; cousin Peggy Rosenbrock and cousin Owen Bakes of Colorodo. She is also survived by her extended family Marty Naum, Maureen Sicaris, Richard Sieben and Neil Sieben and their families. We love you forever and always Kathy and are so grateful to have been a part of your life.


  • Memorial Service Sunday, February 10, 2019
  • Reception Immediately Following Sunday, February 10, 2019

Kathy Sieben

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Maya Or

February 18, 2019

Hello All,
I had the pleasure of working with Kathy at The Jewelry Box, she was the first person I met when I was a customer and what a kind, sweet lady she was. A year later I was working with her and we became fast friends. Kathy had so much compassion for people and for me as her friend she helped me through the recent loss of my 16 year dog, what a support she was and you know her.....she made up a basket with a cozy blanket for my sweet dog. There is sooo much more....we had lots of laughs & shared many stories together. I miss Kathy SO much! I am comforted in my faith that Kathy is with the Angels and at Peace. 🌺 Much Aloha Maya💜

Kathy Bates

February 9, 2019

Kathy and I met 30 years ago at work’; I remember how classy and fun she was and we became “best buddies” and great friends.
I will always remember her kindness, sweetness and generosity and best of
All the fun memories we made together along with always celebrating our
Birthdays together.
It will be very sad to not talk to her, see her, and laugh with her.
Dan, Kathy always told me how much she loved you. You were so special to
Kathy I loved you and knowing you loved me as a sister, I will keep you in my
Heart forever.

Becki Flynn

February 7, 2019

Fly high my friend - heaven has another angel, you left us far too soon! Friends for over 45 years, I will miss our chats and friendship and I will cherish all the beautiful memories. Until we meet again - love you Kathy.

Steve Enneking

February 6, 2019

I grew up with Kathy & Judy, & it always felt like we were family. We used to see each other frequently when we were young & we always had so much fun.
Kathy: You left us too soon. I regret that we saw each other infrequently in recent years.
My heart goes out to your family. You will be greatly missed.

Peggy Rosenbrock

February 5, 2019

We are simply devastated! This bright light is someone I always thought would be shining in my life. I have so many fond memories from childhood to adulthood. Christmas was always a special time because we knew we would get to see our California family. It was simply magical! in the summer, Kathy and Judy would come to the farm for 2 weeks. We could get into some trouble, just like siblings, but in looking back, it was pretty insignificant stuff we did. When I was 16, we started having a reunion in Las Vegas over Labor Day to celebrate Aunties birthday. Auntie always said she wanted us to be close so when their generation was gone, we would have each other. She always made it happen, but little did she know that Kathy would leave us so soon. As we all got married, Thanksgiving in Colorado was our special time. It was something we all looked forward to...4 days of non-stop fun and tons of love.
Kathy and Judy were like sisters to me and I have a huge hole in my heart! 💔Love you Kath! 😓

Chris Cooper

February 5, 2019

We shared so many memories together I couldn't even begin to mention them all. All the trips to Hawaii and family vacations. Times I'll never forget. You were the best Aunt in the world. I hope you know how much I love you. You were always there for me, through the good and the bad. You will never be forgotten.

Peggy Phillips

February 5, 2019

Dear Dan. I am so sorry to hear about Kathy. That is a terrible and unexpected loss. Hope you can find peace in the coming days. My thoughts are with you but I can not imagine the grief you are experiencing. Sincerely cousin Peggy

Maria Moffa

February 5, 2019

Kathy, my heart breaks as I write this. You’re one of the most gracious people that graced Camino Papal! Always so cute, so spunky, and always with your sweet smile. Darn it! You left us way too soon! Thank you for being you! You were one of a kind!

Maureen Sidaris

February 5, 2019

Kathy, I met you when I was 17 years old and I remember warning you about dating my wild brother, Dan! You were the one who finally captured his heart and I was thrilled when you became my big sister. We've shared a lot over the years, both happy and sad and I'm so glad you became part of our family. I'm going to miss you like crazy and will love you forever. Mo

Sue Kruse

February 5, 2019

Kathy and I met a little over 45 years ago when we pledged Tri Delta in the Fall of 1973. We were very close and were roommates during college and for a few years after college , too. I never would have met my husband if it wasn’t for Kath. I have so many fond memories of her, but I’m sad that we only saw each other once in the past 30 years. She was always such a joy to be around and, when we did get together in July 2017, it was as though we’d never skipped a beat. I always loved her infectious smile and laugh and I hope Kath knows how very much I will miss her. I have learned a tough lesson, and that is not to let life get in the way of our lifelong friendships and relationships. You just never know when the Lord will call you or them home. Rest In Peace my dear, sweet friend.