The baby name Erna appears in baby name data for the United States from 1910 to 1967. It was most popular in 1916 with 444 babies given the name.
In the later years of this period, Erna has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 112 |
| 1911 | 132 |
| 1912 | 169 |
| 1913 | 247 |
| 1914 | 268 |
| 1915 | 361 |
| 1916 | 444 |
| 1917 | 382 |
| 1918 | 358 |
| 1919 | 283 |
| 1920 | 287 |
| 1921 | 227 |
| 1922 | 216 |
| 1923 | 259 |
| 1924 | 222 |
| 1925 | 216 |
| 1926 | 202 |
| 1927 | 248 |
| 1928 | 164 |
| 1929 | 191 |
| 1930 | 153 |
| 1931 | 128 |
| 1932 | 106 |
| 1933 | 65 |
| 1934 | 54 |
| 1935 | 62 |
| 1936 | 52 |
| 1937 | 52 |
| 1938 | 31 |
| 1939 | 37 |
| 1940 | 39 |
| 1941 | 23 |
| 1942 | 19 |
| 1943 | 7 |
| 1944 | 7 |
| 1945 | 12 |
| 1950 | 5 |
| 1951 | 5 |
| 1952 | 20 |
| 1953 | 5 |
| 1955 | 12 |
| 1956 | 5 |
| 1957 | 10 |
| 1958 | 10 |
| 1967 | 10 |