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Date of Birth: March 18, 1936

Date of Death: May 17, 2020

Obituary for Calvert Cecil Zethraeus Calvert (“Cal”) Cecil Zethraeus of Flagstaff, AZ passed away May 17, 2020, in Peoria, AZ at the age of 84. He was born on March 18, 1936, in Fort Worth to parents Cecil Calvert Zethraeus and Christine (Sloan) Zethraeus. Cal was an accomplished software developer in the very early years of computer technology. He graduated from Rice University in Houston, TX in 1958 obtaining a degree in physics and studied math at the University of Texas at the doctorate level. Early in his career he worked for Ling-Temco-Vought (LTV) in Dallas TX as a software developer, and later for Burroughs Corp. Computers & Machines developing software, for which computers were built to work with the software that Cal designed. Cal continued his career working for General Electric and Honeywell in the aerospace division for many years in Arizona and Massachusetts, before transitioning to consultant work for various other tech firms in Arizona, Alabama, Colorado and California. In the 80’s he obtained his pilot’s license and enjoyed flying his Piper Archer II. He loved to read, play the piano, travel abroad and enjoyed his “little house in the woods” in Flagstaff, AZ where he spent most of his retirement. Cal and Mary Claire Middlebrook married in 1960 and initially lived in Arlington, TX. They moved to Monrovia, CA in 1962 for a few years then eventually settled central Phoenix, AZ where they started their family. He is survived by two children: Mary Christine Goodman (husband Greg Goodman) and Neal Calvert Zethraeus; grandchildren: Taylor Marie Goodman and Riley Shane Goodman; niece, Christine Annette Crain; nephew Burton Cecil Crain; and former wife Mary Claire (Middlebrook) Lopeman. Calvert is preceded in death by his parents and sister Christine “Chrissie” Crain. And everyone who calls on the name of the Lord will be saved. - Acts 2:21 Then he said to them all: “If anyone would come after me, he must deny himself and take up his cross daily and follow me. For whoever wants to save his life will lose it, but whoever loses his life for me will save it.” – Luke 9:23-24

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