The baby name Merlyn appears in baby name data for the United States from 1914 to 1961. It was most popular in 1930 with 185 babies given the name.
In the later years of this period, Merlyn has become less common than it once was.
| Year | Count |
|---|---|
| 1914 | 18 |
| 1915 | 20 |
| 1916 | 15 |
| 1917 | 45 |
| 1918 | 49 |
| 1919 | 72 |
| 1920 | 83 |
| 1921 | 5 |
| 1921 | 34 |
| 1922 | 90 |
| 1923 | 73 |
| 1924 | 88 |
| 1925 | 77 |
| 1926 | 104 |
| 1927 | 15 |
| 1927 | 164 |
| 1928 | 88 |
| 1929 | 120 |
| 1930 | 185 |
| 1931 | 182 |
| 1932 | 146 |
| 1933 | 133 |
| 1934 | 152 |
| 1935 | 6 |
| 1935 | 141 |
| 1936 | 142 |
| 1937 | 128 |
| 1938 | 120 |
| 1939 | 61 |
| 1940 | 45 |
| 1941 | 63 |
| 1942 | 69 |
| 1943 | 45 |
| 1944 | 42 |
| 1945 | 54 |
| 1946 | 36 |
| 1947 | 15 |
| 1948 | 32 |
| 1949 | 9 |
| 1950 | 32 |
| 1952 | 11 |
| 1953 | 24 |
| 1954 | 21 |
| 1961 | 15 |