Frank Severin Simonsen, 65, of Lawton, Oklahoma, passed away on Thursday, November 5, 2026, in Lawton, Oklahoma.

There are no services scheduled at this time. Cremation is under the direction of Becker-Rabon Funeral Home.

Frank was born in Austin, Texas on November 18, 1960, to John Severin and Doris Joe (Brokaw) Simonsen. He graduated from Eisenhower High School in Lawton, Oklahoma class of "79". Following graduation, he went to Cameron University to earn his bachelor's degree in marine biology. He started Frank's Tanks Saltwater Aquarium shortly after graduating from Cameron University. He owned and operated Frank's Tanks for over 20 years.

Frank was a man who loved life. He enjoyed scuba diving, rock concerts, car shows and playing frisbee, but his greatest enjoyment came from spending time with family.

Frank is survived by his two sons, Severin J. and Gunnar L. Simonsen.

He was preceded in death by his parents and sister, Victoria Stucky.

An online guest book and sympathy cards are available at www.beckerfuneral.com