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The Motherwell-Hogan family, ca. 1918. Clockwise from left: Marion Hogan, John C. Hogan, Margaret Motherwell, R.B. Motherwell II, Katherine Hogan, Robert Motherwell, and Mary Motherwell.

Robert Burns Motherwell III is born on January 24 in Aberdeen, Washington to Robert Burns Motherwell II (1884- 1943), a banker and Margaret Lillian Hogan (1892-1972), the daughter of a prominent local attorney.