Delmo is a very rare variant of Delma that was most common in the 1910s and has all but disappeared.
Delmo is a boy name. It last appears in U.S. records in 1939. Delmo first appears in 1916 and peaked in 1916 (10 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1939 | 5 | — | #3,607 |
| 1938 | 5 | — | #3,641 |
| 1936 | 5 | — | #3,662 |
| 1933 | 6 | — | #3,353 |
| 1931 | 6 | — | #3,476 |
| 1930 | 5 | — | #4,128 |
| 1928 | 7 | — | #3,435 |
| 1927 | 10 | — | #2,746 |
| 1926 | 9 | — | #2,963 |
| 1923 | 8 | — | #3,231 |
| 1922 | 7 | — | #3,602 |
| 1920 | 6 | — | #3,930 |
| 1918 | 8 | — | #3,171 |
| 1917 | 8 | — | #3,001 |
| 1916 | 10 | — | #2,591 |