Lo is a very rare variant of Lou that peaked in 1987 and has since faded.
Lo is predominantly a girl name. It last appears in U.S. records in 2023. Lo first appears in 1920 and peaked in 1935 (6 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2023 | 5 | 5 | #16,620 | — |
| 2022 | 5 | 5 | #16,724 | — |
| 2021 | 6 | 6 | #14,525 | — |
| 2020 | 5 | 5 | #16,540 | — |
| 2018 | 5 | 5 | #17,131 | — |
| 1997 | 5 | — | — | #10,190 |
| 1993 | 5 | — | — | #9,599 |
| 1989 | 6 | — | — | #7,535 |
| 1988 | 5 | — | — | #8,039 |
| 1987 | 7 | — | — | #5,848 |
| 1982 | 5 | — | — | #6,963 |
| 1957 | 6 | — | #5,787 | — |
| 1939 | 5 | — | #4,618 | — |
| 1935 | 6 | — | #4,020 | — |
| 1934 | 5 | — | #4,668 | — |
| 1920 | 5 | — | #5,419 | — |