These are the most popular given names in the United States for all years of the 1930s.
1930
Males Robert James John William Richard Charles Donald George Joseph Edward Females Mary Betty Dorothy Helen Barbara Margaret Maria Patricia Doris Joan; Ruth (tie)
1931
Males Robert James John William Richard Charles Donald George Joseph Thomas Females Mary Betty Dorothy Barbara Joan Helen Maria Patricia Margaret
1932
Males Robert John James William Charles Richard Donald George Joseph Thomas Females Mary Betty Barbara Dorothy Joan Patricia Shirley Margaret Doris Helen
1933
Males Robert James John William Richard Donald Charles Joseph George Thomas Females Mary Betty Barbara Dorothy Joan Patricia Maria Helen Margaret Doris
1934
Males Robert James John William Richard Charles Donald George Thomas Joseph Females Mary Betty Shirley Barbara Joan Patricia Dorothy Maria Margaret Helen
1935
Males James Robert John William Richard Charles Donald Thomas Ronald David Females Mary Shirley Barbara Betty Patricia Joan Dorothy Margaret Maria Helen
1936
Males Robert James John William Donald Richard Charles Ronald George Joseph Females Mary Shirley Barbara Betty Patricia Maria Dorothy; Nancy (tie) Joan Margaret
1937
Males Robert James John William Richard Donald Charles David George Thomas Females Mary Barbara Patricia Shirley Betty Maria; Nancy (tie) Dorothy Carol Margaret
1938
Males Robert James John William Richard Charles Donald David George Ronald; Thomas (tie) Females Mary Barbara Patricia Betty Shirley Nancy Carol; Maria Margaret Joan
1939
Males Robert James John William Richard Charles David Thomas Donald Ronald Females Mary Barbara Patricia Betty Shirley Maria Margaret Carol Nancy Judith
See also Popularity of birth names for females (United States)
References Most Popular 1000 Names of the 1930s from the Social Security Administration