Richard Brevard Russell Jr. (November 2, 1897 – January 21, 1971) was an AmericanDemocratic politician. He served as Governor of Georgia from 1931-1933 before being elected to the U. S. Senate in 1933, where he served until his death in 1971.
The Confederate ambassador to the US is known only as "Russell" and is identified as a Georgian. Based on these two facts and on Harry Turtledove's penchant for including historical figures in the Southern Victory series, the editors of this Wiki are satisfied that Richard Russell is the man he had in mind.