Cassandra Corkum Cosby

July 26, 1935 ~ December 1, 2020 (age 85)


Cassandra Corkum Cosby died on December 1, 2020 at her home in Sonoma. She was 85. Cassandra was born July 26, 1935. Her parents were Dorothy and Freeman Corkum both from Massachusetts.

Cassandra spent many summers with her grandparents in Brockton MA and Cape Cod. Her family moved due to her father’s work as a naval architect and at various times she lived in Virginia, Maryland and Florida. Growing up one of the activities she enjoyed most was sailing with her father.

Cassandra graduated from Boston University in 1958 with a Bachelor's degree in Communications.  She was one of only 10 women in her graduating class. After graduating, she moved back to Florida for a few years before moving to San Francisco in 1964 and began working at KQED shortly thereafter.

In San Francisco Cassandra made new friends, some she’s maintained for her lifetime. And she found love with her neighbor, Robert “Bob” Cosby. In 1966 they married in Mendocino, California. They lived in San Francisco until 1968 when they moved to Mill Valley, CA. They lived there for 43 years.

Cassandra managed being a mother of two children with work at various companies including Marin Community Video and Trans Pacific Bridge which later became a branch of Felissimo.

Cassandra was an active participant in her community. She frequently volunteered at the local public schools including Old Mill and Mill Valley Middle School while her children attended them. In the 1980’s she taught video production to middle school and high school students. She became a member of The Outdoor Art Club of Mill Valley in 2002 and lent her volunteer skills there as part of several committees.

Cassandra and Bob had a yearly tradition of going to Lake Tahoe every summer for two weeks, usually the last week in July and the first week of August. Friends and relatives knew they could always find Cassandra and Bob at the far end of Sand Harbor next to the large rock and pine tree, and in later years at Secret Beach.  Many family members and friends have fond memories of being at Tahoe with Cassandra.

In 2011 Cassandra and Bob moved to the Temelec community in Sonoma where they made many new friends. Cassandra enjoyed her retirement there, participating in activities at the Temelec Club House. She was a member of the Board of Temelec Social Club for many years.

Cassandra was preceded in death by her brother Peter Corkum and sister Prudence Force. She  is survived by her husband of 54 years Robert Cosby, children Amy Cosby-Frost (Josh) and Coleman Cosby (Kathleen) , grandchildren Alexander Frost, Emelia Frost and Sadie Cosby, sister Sally Manley  (Gary) and brother Freeman Corkum Jr. (Patricia) , niece Cindy Kelvey (Lisa DeMeulenaere), nephew Ravi Rourke, great niece Megan Scribner (Michelle) and great nephews David Kelvey (Andreana) and Angelo Rourke.

Cassandra was described by many friends and relatives as a light and a force, a strong, smart, creative woman who cared for many family members and friends over the years. She touched many lives and will be greatly missed by all who knew her.

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