Yoneko Mitsui Steffensen died on December 28, 1991 in Sonoma County, California. Born in Japan on July 29, 1929, she lived to be 62 years, 4 months, 29 days old.
Her father's last name was Nakajima, and mother's maiden name was Nakajima. Her Social Security Number was 557-80-6446.
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