These names were popular in the US for the year 1920. I will skip the very top names that I've already mentioned in my previous posts in order to avoid repetition.
1 Ralph or Warren
2 Anthony or Andrew
3 Clyde or Glenn
4 Gordon or Wallace
5 Arnold or Gilbert
6 Allen or Roger
7 Douglas or Sidney
8 Franklin or Virgil
9 Curtis or Irving
10 Bruce or Wayne