Petro is a very rare variant of Peter that was most common in the 1970s and has all but disappeared.
Petro is a boy name. It last appears in U.S. records in 2015. Petro first appears in 1918 and peaked in 1971 (11 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2015 | 5 | 5 | #13,535 |
| 2009 | 5 | 5 | #13,964 |
| 1993 | 5 | — | #9,783 |
| 1988 | 5 | — | #8,199 |
| 1986 | 6 | — | #6,513 |
| 1976 | 11 | — | #3,419 |
| 1975 | 7 | — | #4,659 |
| 1974 | 7 | — | #4,508 |
| 1972 | 7 | — | #4,324 |
| 1971 | 11 | — | #3,096 |
| 1969 | 8 | — | #3,512 |
| 1960 | 6 | — | #3,957 |
| 1959 | 5 | — | #4,423 |
| 1954 | 8 | — | #3,114 |
| 1934 | 5 | — | #4,089 |
| 1930 | 6 | — | #3,900 |
| 1928 | 5 | — | #4,595 |
| 1926 | 7 | — | #3,628 |
| 1925 | 5 | — | #4,738 |
| 1924 | 7 | — | #3,772 |
| 1923 | 7 | — | #3,734 |
| 1921 | 6 | — | #4,218 |
| 1920 | 10 | — | #2,915 |
| 1918 | 6 | — | #4,063 |