The baby name Bettylou appears in baby name data for the United States from 1923 to 1947. It was most popular in 1927 with 75 babies given the name.
In the later years of this period, Bettylou has become less common than it once was.
| Year | Count |
|---|---|
| 1923 | 10 |
| 1924 | 62 |
| 1925 | 18 |
| 1926 | 31 |
| 1927 | 75 |
| 1928 | 53 |
| 1929 | 23 |
| 1930 | 42 |
| 1931 | 23 |
| 1932 | 10 |
| 1933 | 12 |
| 1934 | 17 |
| 1935 | 5 |
| 1937 | 16 |
| 1938 | 27 |
| 1939 | 5 |
| 1940 | 9 |
| 1941 | 11 |
| 1942 | 6 |
| 1945 | 7 |
| 1946 | 10 |
| 1947 | 8 |