Lennart is a rare variant of Leonard that peaked in 1916 and has since faded.
Lennart is a boy name. It last appears in U.S. records in 2021. Lennart first appears in 1911 and peaked in 1916 (18 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2021 | 5 | 5 | #13,295 |
| 2012 | 8 | 8 | #9,373 |
| 2010 | 5 | 5 | #13,480 |
| 2006 | 5 | 5 | #13,218 |
| 1977 | 5 | — | #6,431 |
| 1964 | 6 | — | #3,859 |
| 1963 | 8 | — | #3,212 |
| 1962 | 5 | — | #4,388 |
| 1959 | 8 | — | #3,164 |
| 1958 | 6 | — | #3,761 |
| 1957 | 6 | — | #3,801 |
| 1956 | 7 | — | #3,391 |
| 1952 | 7 | — | #3,258 |
| 1951 | 7 | — | #3,232 |
| 1950 | 5 | — | #3,978 |
| 1948 | 7 | — | #3,184 |
| 1947 | 7 | — | #3,251 |
| 1946 | 7 | — | #3,061 |
| 1944 | 8 | — | #2,762 |
| 1943 | 13 | — | #2,127 |
| 1942 | 9 | — | #2,624 |
| 1940 | 7 | — | #3,018 |
| 1939 | 5 | — | #3,759 |
| 1938 | 8 | — | #2,776 |
| 1937 | 9 | — | #2,595 |
| 1936 | 8 | — | #2,759 |
| 1935 | 15 | — | #1,883 |
| 1934 | 7 | — | #3,160 |
| 1933 | 9 | — | #2,648 |
| 1932 | 12 | — | #2,265 |
| 1931 | 13 | — | #2,162 |
| 1930 | 16 | — | #1,933 |
| 1929 | 11 | — | #2,531 |
| 1928 | 13 | — | #2,336 |
| 1927 | 8 | — | #3,322 |
| 1926 | 10 | — | #2,826 |
| 1925 | 17 | — | #1,975 |
| 1924 | 11 | — | #2,756 |
| 1923 | 6 | — | #4,061 |
| 1922 | 10 | — | #2,918 |
| 1921 | 8 | — | #3,374 |
| 1920 | 7 | — | #3,675 |
| 1919 | 5 | — | #4,522 |
| 1918 | 7 | — | #3,556 |
| 1917 | 8 | — | #3,081 |
| 1916 | 18 | — | #1,734 |
| 1915 | 12 | — | #2,249 |
| 1914 | 10 | — | #2,202 |
| 1913 | 7 | — | #2,395 |
| 1911 | 5 | — | #1,895 |