The baby name Arnaldo appears in baby name data for the United States from 1943 to 2011. It was most popular in 1989 with 61 babies given the name.
In the later years of this period, Arnaldo has become more popular compared with earlier years.
| Year | Count |
|---|---|
| 1943 | 5 |
| 1944 | 6 |
| 1945 | 5 |
| 1946 | 6 |
| 1947 | 21 |
| 1949 | 5 |
| 1950 | 5 |
| 1953 | 8 |
| 1955 | 11 |
| 1956 | 19 |
| 1957 | 9 |
| 1958 | 9 |
| 1959 | 12 |
| 1960 | 12 |
| 1961 | 8 |
| 1962 | 27 |
| 1963 | 11 |
| 1964 | 9 |
| 1965 | 18 |
| 1966 | 25 |
| 1967 | 8 |
| 1969 | 13 |
| 1970 | 10 |
| 1971 | 12 |
| 1972 | 10 |
| 1973 | 23 |
| 1974 | 16 |
| 1975 | 18 |
| 1977 | 11 |
| 1978 | 48 |
| 1979 | 12 |
| 1980 | 21 |
| 1981 | 38 |
| 1982 | 43 |
| 1983 | 18 |
| 1984 | 42 |
| 1985 | 17 |
| 1986 | 28 |
| 1987 | 15 |
| 1988 | 17 |
| 1989 | 61 |
| 1990 | 42 |
| 1991 | 34 |
| 1992 | 23 |
| 1994 | 8 |
| 1995 | 20 |
| 1996 | 20 |
| 1997 | 12 |
| 1998 | 14 |
| 1999 | 5 |
| 2000 | 12 |
| 2001 | 24 |
| 2002 | 6 |
| 2004 | 15 |
| 2008 | 5 |
| 2011 | 10 |