Here is the listing of most popular baby names from 1940:

1 James Mary
2 Robert Barbara
3 John Patricia
4 William Judith
5 Richard Betty
6 Charles Carol
7 David Nancy
8 Thomas Linda
9 Donald Shirley
10 Ronald Sandra
11 George Margaret
12 Joseph Dorothy
13 Larry Joyce
14 Jerry Joan
15 Kenneth Carolyn
16 Edward Judy
17 Paul Sharon
18 Michael Helen
19 Gary Janet
20 Frank Elizabeth