Erby is a rare boys' name that was most common in the 1920s and has all but disappeared.
Erby is a boy name. It last appears in U.S. records in 1976. Erby first appears in 1894 and peaked in 1921 (17 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1976 | 7 | — | #4,565 |
| 1970 | 5 | — | #4,936 |
| 1966 | 5 | — | #4,122 |
| 1964 | 5 | — | #4,235 |
| 1963 | 5 | — | #4,235 |
| 1962 | 8 | — | #3,131 |
| 1959 | 6 | — | #3,727 |
| 1957 | 7 | — | #3,341 |
| 1956 | 6 | — | #3,653 |
| 1955 | 7 | — | #3,291 |
| 1954 | 8 | — | #3,023 |
| 1953 | 7 | — | #3,219 |
| 1952 | 6 | — | #3,484 |
| 1951 | 8 | — | #2,909 |
| 1950 | 5 | — | #3,846 |
| 1948 | 8 | — | #2,851 |
| 1947 | 9 | — | #2,726 |
| 1946 | 7 | — | #2,987 |
| 1945 | 5 | — | #3,467 |
| 1944 | 9 | — | #2,518 |
| 1943 | 7 | — | #3,041 |
| 1942 | 8 | — | #2,776 |
| 1941 | 8 | — | #2,717 |
| 1940 | 9 | — | #2,539 |
| 1939 | 11 | — | #2,206 |
| 1938 | 8 | — | #2,716 |
| 1937 | 9 | — | #2,548 |
| 1936 | 6 | — | #3,273 |
| 1934 | 17 | — | #1,738 |
| 1933 | 10 | — | #2,421 |
| 1932 | 6 | — | #3,494 |
| 1931 | 12 | — | #2,238 |
| 1930 | 14 | — | #2,105 |
| 1929 | 11 | — | #2,484 |
| 1928 | 16 | — | #1,992 |
| 1927 | 8 | — | #3,242 |
| 1926 | 15 | — | #2,106 |
| 1925 | 5 | — | #4,412 |
| 1924 | 12 | — | #2,517 |
| 1923 | 13 | — | #2,371 |
| 1922 | 16 | — | #2,074 |
| 1921 | 17 | — | #2,006 |
| 1920 | 9 | — | #3,032 |
| 1919 | 16 | — | #2,001 |
| 1918 | 12 | — | #2,440 |
| 1917 | 12 | — | #2,331 |
| 1916 | 16 | — | #1,875 |
| 1915 | 12 | — | #2,215 |
| 1914 | 8 | — | #2,506 |
| 1913 | 5 | — | #2,963 |
| 1912 | 5 | — | #2,656 |
| 1904 | 6 | — | #1,104 |
| 1894 | 8 | — | #808 |