Alfonsa
Alfonsa was last recorded in 1972, when 6 babies were given it; 155 Americans have been recorded with it between 1919 and 1972 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Alfonsa by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Alfonsa?
Unranked in 2025
Its last boys’ rank on record is #4,454, in 1972; SSA lists a name only in years with 5 or more births.
11 babies in 1947, the peak
Alfonsa peaked in 1947, when 11 boys were given it, #2,356 among boys’ names. It was not recorded in 2025.
Births by sex.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1972 | 6 | #4,454 | 3.7 |
| 1970 | 5 | #4,738 | 2.7 |
| 1969 | 7 | #3,601 | 3.9 |
| 1962 | 6 | #3,645 | 2.9 |
| 1959 | 6 | #3,624 | 2.8 |
| 1956 | 5 | #3,947 | 2.4 |
| 1955 | 7 | #3,203 | 3.4 |
| 1954 | 5 | #3,837 | 2.5 |
| 1952 | 5 | #3,746 | 2.6 |
| 1951 | 9 | #2,665 | 4.8 |
Every recorded year (23)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1948 | 6 | #3,324 | 3.4 |
| 1947 | 11 | #2,356 | 6.0 |
| 1946 | 8 | #2,693 | 4.9 |
| 1943 | 5 | #3,548 | 3.5 |
| 1942 | 5 | #3,575 | 3.6 |
| 1941 | 6 | #3,137 | 4.9 |
| 1940 | 6 | #3,138 | 5.2 |
| 1938 | 6 | #3,180 | 5.4 |
| 1933 | 9 | #2,543 | 9.1 |
| 1930 | 5 | #4,008 | 4.6 |
| 1929 | 6 | #3,564 | 5.6 |
| 1928 | 5 | #4,161 | 4.5 |
| 1919 | 5 | #4,173 | 5.1 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Alfonsa a boy’s or a girl’s name?
Of the 155 Americans recorded as Alfonsa, 7% are girls and 93% boys.
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Alfonsa: the SSA national file counts each sex separately.
How many people are named Alfonsa, and how old are they?
An estimated 67 Americans named Alfonsa and born in the U.S. are alive in 2026, too few to state an age range. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 448 people named Alfonsa (352 women and girls, 96 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 83 born in the U.S. The Census count is 5.4 times that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 4 names spelled alike, given to 43,386 babies since 1880, Alfonsa is the fourth most given (<1% of them). In 2025 none of their 223 babies recorded by SSA was a Alfonsa (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Alfonsa
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Alfonsa and names like it
- Compare Alfonsa and AlfonsoBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1940sAlfonsa peaked in 1947.
- The top names of 1947The year the most babies were named Alfonsa.
- Names starting with AMost given first.