Alfonzo is an uncommon variant of Alfonso that peaked in 1970 and has grown less common since.
Alfonzo is a boy name. In 2025 it ranked #3,953 for boy births in the United States (and #8,459 across all names), given to 27 babies. Alfonzo first appears in 1889 and peaked in 1970 (90 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 27 | 27 | #3,953 |
| 2024 | 23 | 23 | #4,439 |
| 2023 | 19 | 19 | #5,080 |
| 2022 | 22 | 22 | #4,575 |
| 2021 | 27 | 27 | #3,916 |
| 2020 | 22 | 22 | #4,431 |
| 2019 | 30 | 30 | #3,643 |
| 2018 | 16 | 16 | #5,559 |
| 2017 | 25 | 25 | #4,109 |
| 2016 | 32 | 32 | #3,445 |
| 2015 | 31 | 31 | #3,514 |
| 2014 | 29 | 29 | #3,621 |
| 2013 | 26 | 26 | #3,865 |
| 2012 | 33 | 33 | #3,300 |
| 2011 | 31 | 31 | #3,436 |
| 2010 | 27 | 27 | #3,814 |
| 2009 | 41 | 41 | #2,899 |
| 2008 | 34 | 34 | #3,288 |
| 2007 | 38 | 38 | #3,027 |
| 2006 | 44 | 44 | #2,660 |
| 2005 | 38 | 38 | #2,803 |
| 2004 | 33 | 33 | #3,019 |
| 2003 | 33 | 33 | #2,925 |
| 2002 | 48 | 48 | #2,196 |
| 2001 | 42 | 42 | #2,349 |
| 2000 | 45 | 45 | #2,196 |
| 1999 | 50 | 50 | #1,933 |
| 1998 | 42 | 42 | #2,157 |
| 1997 | 53 | — | #1,790 |
| 1996 | 59 | — | #1,639 |
| 1995 | 44 | — | #1,914 |
| 1994 | 60 | — | #1,544 |
| 1993 | 63 | — | #1,472 |
| 1992 | 68 | — | #1,371 |
| 1991 | 78 | — | #1,264 |
| 1990 | 69 | — | #1,336 |
| 1989 | 79 | — | #1,206 |
| 1988 | 69 | — | #1,224 |
| 1987 | 70 | — | #1,140 |
| 1986 | 65 | — | #1,174 |
| 1985 | 64 | — | #1,170 |
| 1984 | 55 | — | #1,240 |
| 1983 | 78 | — | #1,000 |
| 1982 | 58 | — | #1,218 |
| 1981 | 71 | — | #1,077 |
| 1980 | 60 | — | #1,176 |
| 1979 | 70 | — | #1,056 |
| 1978 | 81 | — | #961 |
| 1977 | 85 | — | #922 |
| 1976 | 86 | — | #892 |
| 1975 | 84 | — | #900 |
| 1974 | 72 | — | #961 |
| 1973 | 69 | — | #971 |
| 1972 | 81 | — | #889 |
| 1971 | 84 | — | #886 |
| 1970 | 90 | — | #848 |
| 1969 | 68 | — | #920 |
| 1968 | 64 | — | #898 |
| 1967 | 70 | — | #856 |
| 1966 | 69 | — | #875 |
| 1965 | 66 | — | #912 |
| 1964 | 71 | — | #901 |
| 1963 | 61 | — | #961 |
| 1962 | 64 | — | #947 |
| 1961 | 73 | — | #896 |
| 1960 | 63 | — | #951 |
| 1959 | 73 | — | #897 |
| 1958 | 52 | — | #1,060 |
| 1957 | 83 | — | #831 |
| 1956 | 65 | — | #924 |
| 1955 | 83 | — | #801 |
| 1954 | 72 | — | #863 |
| 1953 | 82 | — | #786 |
| 1952 | 64 | — | #878 |
| 1951 | 63 | — | #881 |
| 1950 | 64 | — | #850 |
| 1949 | 60 | — | #885 |
| 1948 | 62 | — | #868 |
| 1947 | 63 | — | #878 |
| 1946 | 47 | — | #980 |
| 1945 | 37 | — | #1,057 |
| 1944 | 40 | — | #1,039 |
| 1943 | 45 | — | #998 |
| 1942 | 36 | — | #1,139 |
| 1941 | 50 | — | #898 |
| 1940 | 33 | — | #1,158 |
| 1939 | 42 | — | #977 |
| 1938 | 22 | — | #1,439 |
| 1937 | 39 | — | #1,017 |
| 1936 | 35 | — | #1,096 |
| 1935 | 31 | — | #1,194 |
| 1934 | 42 | — | #983 |
| 1933 | 30 | — | #1,203 |
| 1932 | 60 | — | #821 |
| 1931 | 36 | — | #1,128 |
| 1930 | 45 | — | #1,021 |
| 1929 | 46 | — | #995 |
| 1928 | 35 | — | #1,212 |
| 1927 | 40 | — | #1,128 |
| 1926 | 46 | — | #1,018 |
| 1925 | 46 | — | #1,012 |
| 1924 | 32 | — | #1,288 |
| 1923 | 25 | — | #1,503 |
| 1922 | 30 | — | #1,333 |
| 1921 | 37 | — | #1,178 |
| 1920 | 31 | — | #1,300 |
| 1919 | 35 | — | #1,188 |
| 1918 | 27 | — | #1,373 |
| 1917 | 31 | — | #1,222 |
| 1916 | 38 | — | #1,045 |
| 1915 | 24 | — | #1,373 |
| 1914 | 20 | — | #1,342 |
| 1913 | 12 | — | #1,582 |
| 1912 | 15 | — | #1,225 |
| 1911 | 7 | — | #1,389 |
| 1910 | 12 | — | #929 |
| 1909 | 16 | — | #680 |
| 1908 | 6 | — | #1,220 |
| 1907 | 7 | — | #1,096 |
| 1906 | 6 | — | #1,115 |
| 1905 | 8 | — | #921 |
| 1904 | 9 | — | #811 |
| 1903 | 10 | — | #734 |
| 1902 | 7 | — | #933 |
| 1901 | 5 | — | #1,061 |
| 1900 | 9 | — | #902 |
| 1898 | 5 | — | #1,125 |
| 1889 | 8 | — | #724 |