Take any baby name and ask not how many babies got it, but where they were born. Most names are spread roughly evenly across the country. A few are wildly concentrated in one state, far past what its population would predict. Those are a state's signature names, and when you line up all 50 of them, you get a map of America that nobody set out to draw.
The measure here is simple. For each state we take a name's share of births in that state and divide it by its share of births nationally. A score of 1 means the name is exactly as common there as everywhere else. A score of 20 means it is twenty times more concentrated in that state than in the country at large. Every name below is the highest-scoring name in its state, drawn from SSA records going back to 1910, with a floor on total births so the list isn't just statistical noise from a single year.
The immigrant map
The strongest signatures trace migration. Angelle is fifty times more concentrated in Louisiana than nationally, a Cajun French feminine name that essentially does not exist outside the state. Eloy in New Mexico and Jesusa in Texas mark the Hispanic Catholic Southwest. Abdirahman is Minnesota's most distinctive name, almost entirely because of the Somali community concentrated around the Twin Cities. Benuel, Pennsylvania's signature, is an Amish name. In Hawaii the top of the list is a mix of Japanese-immigrant names like Shizue and Hawaiian names like Kainoa and Keanu, often three hundred times more concentrated there than on the mainland.
The faith map
Two states are dominated by religious naming traditions. New Jersey and New York both surface Orthodox Jewish names at the top of their lists, Avrohom and Yides, concentrated in specific communities in and around New York City. And then there is Utah, which is less a state with a few distinctive names than a naming culture of its own. Dallin, Ammon, Brigham, Brynlee, and Stockton all cluster there, drawn from LDS history and a local taste for inventive spellings. No other state generates this many of its own names.
The stadium map
The finding we did not expect: two states name their sons after football stadiums. In Iowa, the most distinctive name is Kinnick — Kinnick Stadium, home of the Hawkeyes, named for Nile Kinnick, the 1939 Heisman winner who died in WWII. In Tennessee, it is Neyland — Neyland Stadium, where the Volunteers play. Both names are recent, both are overwhelmingly local, and both exist because a state's devotion to its college football team is strong enough to show up on birth certificates. Alabama's signature, Crimson, belongs to the same impulse.
The leftover century
For states without a strong immigrant, faith, or sports signature, the top name is usually a mid-century relic — a name that was briefly fashionable in that state decades ago and nowhere else since. Marlys in North Dakota, Drema in West Virginia, Twila in Kansas. These are quieter signatures, but they are signatures all the same: a name the rest of the country forgot, still carried by one state's grandparents.
A caveat worth stating plainly. The SSA suppresses any name with fewer than five births in a state in a given year, which hits the smallest states hardest. Wyoming, Vermont, Alaska, and Delaware have thinner records and weaker, older signatures as a result. The map is real, but it is sharper in the places with more people in it.
Browse the names: Angelle · Kinnick · Neyland · Dallin · Abdirahman · Benuel