Lassie is a rare variant of Lacie that was most common in the 1910s and has all but disappeared.
Lassie is a girl name. It last appears in U.S. records in 1963. Lassie first appears in 1883 and peaked in 1916 (42 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1963 | 5 | — | #7,139 |
| 1961 | 5 | — | #7,084 |
| 1956 | 5 | — | #6,446 |
| 1955 | 9 | — | #4,235 |
| 1953 | 7 | — | #4,812 |
| 1952 | 7 | — | #4,721 |
| 1951 | 5 | — | #5,829 |
| 1949 | 7 | — | #4,465 |
| 1948 | 6 | — | #4,961 |
| 1947 | 10 | — | #3,582 |
| 1946 | 5 | — | #5,338 |
| 1945 | 5 | — | #4,922 |
| 1944 | 8 | — | #3,543 |
| 1943 | 10 | — | #3,163 |
| 1942 | 9 | — | #3,319 |
| 1941 | 5 | — | #4,751 |
| 1940 | 17 | — | #2,003 |
| 1939 | 14 | — | #2,258 |
| 1938 | 5 | — | #4,675 |
| 1937 | 11 | — | #2,644 |
| 1936 | 13 | — | #2,332 |
| 1935 | 14 | — | #2,252 |
| 1934 | 15 | — | #2,137 |
| 1933 | 8 | — | #3,270 |
| 1932 | 15 | — | #2,185 |
| 1931 | 17 | — | #1,987 |
| 1930 | 9 | — | #3,202 |
| 1929 | 8 | — | #3,546 |
| 1928 | 24 | — | #1,709 |
| 1927 | 23 | — | #1,795 |
| 1926 | 22 | — | #1,853 |
| 1925 | 27 | — | #1,628 |
| 1924 | 20 | — | #2,035 |
| 1923 | 25 | — | #1,703 |
| 1922 | 29 | — | #1,550 |
| 1921 | 25 | — | #1,745 |
| 1920 | 26 | — | #1,640 |
| 1919 | 32 | — | #1,383 |
| 1918 | 29 | — | #1,473 |
| 1917 | 23 | — | #1,622 |
| 1916 | 42 | — | #1,094 |
| 1915 | 32 | — | #1,240 |
| 1914 | 16 | — | #1,696 |
| 1913 | 13 | — | #1,720 |
| 1912 | 26 | — | #1,017 |
| 1911 | 13 | — | #1,334 |
| 1910 | 21 | — | #955 |
| 1909 | 10 | — | #1,417 |
| 1908 | 20 | — | #899 |
| 1907 | 12 | — | #1,173 |
| 1906 | 11 | — | #1,192 |
| 1905 | 12 | — | #1,130 |
| 1904 | 11 | — | #1,139 |
| 1903 | 13 | — | #1,004 |
| 1902 | 14 | — | #953 |
| 1901 | 14 | — | #901 |
| 1900 | 8 | — | #1,506 |
| 1899 | 6 | — | #1,502 |
| 1898 | 11 | — | #1,071 |
| 1897 | 15 | — | #847 |
| 1896 | 14 | — | #887 |
| 1895 | 11 | — | #1,020 |
| 1893 | 8 | — | #1,129 |
| 1892 | 13 | — | #849 |
| 1891 | 14 | — | #740 |
| 1890 | 11 | — | #855 |
| 1889 | 5 | — | #1,387 |
| 1888 | 7 | — | #1,088 |
| 1887 | 5 | — | #1,227 |
| 1886 | 7 | — | #946 |
| 1883 | 5 | — | #984 |