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Daniel and Isabella were the most popular baby names in New York City in 2007, according to an insanely exhaustive, 81-page report issued today by the city's Department of Health. (So that's what they do when they're not checking restaurants for mice and roaches.) More interesting is the second most-popular name for boys: It's Jayden, which one baby name "expert" attributes to—you guessed it—the "Britney effect." She also adds that the "entire '-aiden' phenomenon has been a huge naming force" over the past year, and she's been seeing an increasing number of parents name their kids Hayden, Caiden, Raiden, and Zaydon. "I'm even hearing Graydon," she says. Consider yourself warned, Mr. Carter! [City Room]