US baby name trends & finder
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Use this when the user wants baby name ideas or lists filtered by sex, first letter, ending, letters contained, length, syllables, 2025 popularity (e.g. "familiar but not common" = rank 201-1000), rising names, vintage names (popular 1910-1930, rare now), names popular in an era, or unisex names (40-60% girls). Returns matching names with 2025 rank, births and trend from US Social Security data. Does not give meanings, origins, religious or astrological criteria; do not use for non-US popularity.
girl, boy or any (default any: girls and boys listed separately), e.g. girl.
Order: popular (most 2025 births), rising (biggest growth), alphabetical, rarest (fewest 2025 births). Default popular, or rising with rising_years.
How many names to return, 1-60, e.g. 30 (default).
Era end year, e.g. 1959.
true = names where girls are 40-60% of 2016-2025 US births (at least 100 births in that period). Example: true.
true = vintage names: top 300 in some year 1910-1930 and outside the 2025 top 1,000. Example: true.
Name contains these letters anywhere, e.g. "rose".
Era start year for 'popular back then', e.g. 1950.
Highest 2025 rank number to include, e.g. 1000.
Lowest 2025 rank number to include, e.g. 200.
Name ends with these letters, e.g. "lyn".
Maximum letters, e.g. 6.
Minimum letters, e.g. 3.
2025 rank band: top_100 (1-100), common (101-200), familiar (201-1000, familiar but not common), uncommon (1001-5000), rare (5001 or lower). Example: familiar.
Name begins with these letters, case-insensitive, e.g. "a" or "el".
Rank a name must have reached in some era year, e.g. 100. Default 300.
Only names with more births in 2025 than N years earlier, sorted by growth, e.g. 10 (compares 2015 to 2025).
Maximum syllables (approximate), e.g. 2.
Minimum syllables (approximate), e.g. 2.
Minimum US births in 2025, e.g. 100. Default 50 when rising_years is set, else 0.
Use this when the user wants baby name ideas or lists filtered by sex, first letter, ending, letters contained, length, syllables, 2025 popularity (e.g. "familiar but not common" = rank 201-1000), rising names, vintage names (popular 1910-1930, rare now), names popular in an era, or unisex names (40-60% girls). Returns matching names with 2025 rank, births and trend from US Social Security data. Does not give meanings, origins, religious or astrological criteria; do not use for non-US popularity.
| Argument | Type | Description |
|---|---|---|
| sex | string | girl, boy or any (default any: girls and boys listed separately), e.g. girl. |
| sort | string | Order: popular (most 2025 births), rising (biggest growth), alphabetical, rarest (fewest 2025 births). Default popular, or rising with rising_years. |
| limit | integer | How many names to return, 1-60, e.g. 30 (default). |
| era_to | integer | Era end year, e.g. 1959. |
| unisex | boolean | true = names where girls are 40-60% of 2016-2025 US births (at least 100 births in that period). Example: true. |
| vintage | boolean | true = vintage names: top 300 in some year 1910-1930 and outside the 2025 top 1,000. Example: true. |
| contains | string | Name contains these letters anywhere, e.g. "rose". |
| era_from | integer | Era start year for 'popular back then', e.g. 1950. |
| rank_max | integer | Highest 2025 rank number to include, e.g. 1000. |
| rank_min | integer | Lowest 2025 rank number to include, e.g. 200. |
| ends_with | string | Name ends with these letters, e.g. "lyn". |
| max_length | integer | Maximum letters, e.g. 6. |
| min_length | integer | Minimum letters, e.g. 3. |
| popularity | string | 2025 rank band: top_100 (1-100), common (101-200), familiar (201-1000, familiar but not common), uncommon (1001-5000), rare (5001 or lower). Example: familiar. |
| starts_with | string | Name begins with these letters, case-insensitive, e.g. "a" or "el". |
| era_max_rank | integer | Rank a name must have reached in some era year, e.g. 100. Default 300. |
| rising_years | integer | Only names with more births in 2025 than N years earlier, sorted by growth, e.g. 10 (compares 2015 to 2025). |
| max_syllables | integer | Maximum syllables (approximate), e.g. 2. |
| min_syllables | integer | Minimum syllables (approximate), e.g. 2. |
| min_births_2025 | integer | Minimum US births in 2025, e.g. 100. Default 50 when rising_years is set, else 0. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"sex": {
"enum": [
"girl",
"boy",
"any"
],
"type": "string",
"maxLength": 30,
"description": "girl, boy or any (default any: girls and boys listed separately), e.g. girl."
},
"sort": {
"enum": [
"popular",
"rising",
"alphabetical",
"rarest"
],
"type": "string",
"maxLength": 30,
"description": "Order: popular (most 2025 births), rising (biggest growth), alphabetical, rarest (fewest 2025 births). Default popular, or rising with rising_years."
},
"limit": {
"type": "integer",
"maximum": 60,
"minimum": 1,
"description": "How many names to return, 1-60, e.g. 30 (default)."
},
"era_to": {
"type": "integer",
"maximum": 2025,
"minimum": 1880,
"description": "Era end year, e.g. 1959."
},
"unisex": {
"type": "boolean",
"description": "true = names where girls are 40-60% of 2016-2025 US births (at least 100 births in that period). Example: true."
},
"vintage": {
"type": "boolean",
"description": "true = vintage names: top 300 in some year 1910-1930 and outside the 2025 top 1,000. Example: true."
},
"contains": {
"type": "string",
"maxLength": 10,
"description": "Name contains these letters anywhere, e.g. \"rose\"."
},
"era_from": {
"type": "integer",
"maximum": 2025,
"minimum": 1880,
"description": "Era start year for 'popular back then', e.g. 1950."
},
"rank_max": {
"type": "integer",
"maximum": 20000,
"minimum": 1,
"description": "Highest 2025 rank number to include, e.g. 1000."
},
"rank_min": {
"type": "integer",
"maximum": 20000,
"minimum": 1,
"description": "Lowest 2025 rank number to include, e.g. 200."
},
"ends_with": {
"type": "string",
"maxLength": 10,
"description": "Name ends with these letters, e.g. \"lyn\"."
},
"max_length": {
"type": "integer",
"maximum": 15,
"minimum": 1,
"description": "Maximum letters, e.g. 6."
},
"min_length": {
"type": "integer",
"maximum": 15,
"minimum": 1,
"description": "Minimum letters, e.g. 3."
},
"popularity": {
"enum": [
"top_100",
"common",
"familiar",
"uncommon",
"rare"
],
"type": "string",
"maxLength": 30,
"description": "2025 rank band: top_100 (1-100), common (101-200), familiar (201-1000, familiar but not common), uncommon (1001-5000), rare (5001 or lower). Example: familiar."
},
"starts_with": {
"type": "string",
"maxLength": 10,
"description": "Name begins with these letters, case-insensitive, e.g. \"a\" or \"el\"."
},
"era_max_rank": {
"type": "integer",
"maximum": 1000,
"minimum": 1,
"description": "Rank a name must have reached in some era year, e.g. 100. Default 300."
},
"rising_years": {
"type": "integer",
"maximum": 50,
"minimum": 1,
"description": "Only names with more births in 2025 than N years earlier, sorted by growth, e.g. 10 (compares 2015 to 2025)."
},
"max_syllables": {
"type": "integer",
"maximum": 6,
"minimum": 1,
"description": "Maximum syllables (approximate), e.g. 2."
},
"min_syllables": {
"type": "integer",
"maximum": 6,
"minimum": 1,
"description": "Minimum syllables (approximate), e.g. 2."
},
"min_births_2025": {
"type": "integer",
"maximum": 100000,
"minimum": 0,
"description": "Minimum US births in 2025, e.g. 100. Default 50 when rising_years is set, else 0."
}
}
}Use this when the user asks how popular a baby name is or was, its rank or number of babies in a year, its trend, peak year, or wants to compare up to 5 names (e.g. "how popular is Olivia", "Emma vs Ava since 1990", "what rank was Jennifer in 1975"). Returns US Social Security birth counts per year 1880-2025, SSA ranks (top 1,000 for past years; listed names in 2025), peak year, highest rank, 10-year change, girls/boys split and other spellings, with a chart. US data only. Does not give name meanings or origins.
| Argument | Type | Description |
|---|---|---|
| sex | string | Sex for all names, e.g. girl. Default any: each name uses the sex with more US births in 2016-2025. |
| year | integer | Optional single year to report births and rank for, e.g. 1990. |
| names* | array | 1 to 5 first names to look up or compare, e.g. ["Olivia", "Charlotte"]. Add (girl) or (boy) to pick a sex per name, e.g. "Avery (boy)". Accents are ignored for lookup (Zoë finds Zoe). |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"names"
],
"properties": {
"sex": {
"enum": [
"girl",
"boy",
"any"
],
"type": "string",
"maxLength": 30,
"description": "Sex for all names, e.g. girl. Default any: each name uses the sex with more US births in 2016-2025."
},
"year": {
"type": "integer",
"maximum": 2025,
"minimum": 1880,
"description": "Optional single year to report births and rank for, e.g. 1990."
},
"names": {
"type": "array",
"items": {
"type": "string",
"maxLength": 40,
"minLength": 1
},
"maxItems": 5,
"minItems": 1,
"description": "1 to 5 first names to look up or compare, e.g. [\"Olivia\", \"Charlotte\"]. Add (girl) or (boy) to pick a sex per name, e.g. \"Avery (boy)\". Accents are ignored for lookup (Zoë finds Zoe)."
}
}
}