These are the most popular given names in the United States for all years of the 1910s. Data from the Social Security Administration.
1910
Males John William James Robert Joseph Charles; George (tie) Edward Frank Henry
Females Mary Helen Margaret Dorothy; Ruth (tie) Anna Mildred Elizabeth Alice Ethel
1911
Males John William James Joseph Charles; Robert (tie) George Frank Edward Walter
Females Mary Helen Dorothy; Margaret (tie) Ruth Anna Mildred Elizabeth Marie Gladys
1912
Males John William James Robert George Joseph Charles Frank Edward Thomas; Walter (tie) Females Mary Helen Dorothy Ruth Margaret Anna Mildred Frances Elizabeth Marie
1913
Males John William James Robert Joseph Charles George Frank Edward Thomas Females Mary Helen Dorothy Margaret Ruth Mildred Elizabeth Anna Marie Florence
1914
Males John William James Robert Joseph George Charles Frank Edward Walter Females Mary Helen Dorothy Margaret Ruth Mildred Anna Elizabeth Evelyn Marie
1915
Males John William James Robert Joseph Charles George Edward Frank Thomas Females Mary Helen Dorothy Margaret Ruth Anna Mildred Evelyn Virginia Elizabeth
1916
Males John William James Robert Charles George Joseph Edward Frank Walter Females Mary Helen Margaret Dorothy Ruth Mildred Anna Frances Elizabeth Marie
1917
Males John William James Robert Joseph George Charles Edward Frank Thomas; Walter (tie) Females Mary Helen Dorothy Margaret Ruth Anna Frances Elizabeth Mildred Marie
1918
Males John William Robert James Joseph Charles George Edward Frank Thomas Females Mary Helen Dorothy Margaret Ruth Frances Virginia Anna Mildred Elizabeth
1919
Males John William James Robert Charles Joseph George Edward Frank Thomas Females Mary Helen Dorothy Margaret Ruth Virginia Elizabeth Mildred Frances Anna
References http://www.ssa.gov/OACT/babynames/index.html Most Popular 1000 Names of the 1910s from the Social Security Administration