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In page Rosalie Bertell:

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Rosalie Bertell was born to Paul G. and Helen (née Twohey) Bertell in Buffalo, New York, the third of four children. Her mother was Canadian and her father was American. She had an older sister, Mary Katherine Bertell (1925–2011), and a younger brother, John Twohey Bertell (1930–2002). A third sibling, Paul W. Bertell died in infancy in 1921. In 1966, she received a Ph.D. in Biometrics from the Catholic University of America.[citation needed] She received her BA in Math/Physics/Education from D'Youville College, and later was an associate professor of mathematics at D'Youville from 1969 to 1973.[1]