Marilyn Roberta (Ybarra) Birse was born on February 4th, 1931 in San Francisco, California to Frank Ybarra and Edna Garcia. She had an older brother, Frank.
Marilyn Ybarra married Michael Birse and they had children Michael, born 1956, Steven, born 1958, and Sharon "Sherrie" (1962 - 1981).
Marilyn died on April 10, 2000 in Santa Clara County, California, at the age of 69, She is buried in Mission City Memorial Park in Santa Clara, Santa Clara County, California with her daughter Sherrie.