The baby name Willian appears in baby name data for the United States from 1915 to 2018. It was most popular in 1931 with 49 babies given the name.
In the later years of this period, Willian has become less common than it once was.
| Year | Count |
|---|---|
| 1915 | 5 |
| 1920 | 5 |
| 1921 | 6 |
| 1922 | 10 |
| 1924 | 17 |
| 1925 | 20 |
| 1926 | 40 |
| 1927 | 10 |
| 1928 | 47 |
| 1929 | 29 |
| 1930 | 27 |
| 1931 | 49 |
| 1932 | 5 |
| 1933 | 20 |
| 1934 | 26 |
| 1935 | 31 |
| 1936 | 15 |
| 1937 | 6 |
| 1938 | 8 |
| 1939 | 18 |
| 1940 | 11 |
| 1941 | 39 |
| 1942 | 5 |
| 1943 | 43 |
| 1944 | 5 |
| 1945 | 41 |
| 1947 | 5 |
| 1950 | 10 |
| 1951 | 22 |
| 1954 | 5 |
| 1955 | 6 |
| 1956 | 5 |
| 1957 | 10 |
| 1962 | 6 |
| 1963 | 7 |
| 1964 | 22 |
| 1968 | 11 |
| 1969 | 12 |
| 1978 | 6 |
| 1986 | 6 |
| 2006 | 5 |
| 2009 | 5 |
| 2010 | 8 |
| 2013 | 5 |
| 2016 | 5 |
| 2018 | 6 |