I just noticed that Tripp ranked among the top 1,000 baby boy names in the nation for the first time ever in 2008. (Specifically, it was 926th.)
Sarah Palin’s grandson Tripp wasn’t born until the 27th of December, so news of his birth couldn’t have had too much influence on the rankings.
Perhaps the name had been hovering just outside the top 1,000, and the birth announcement resulted in a small surge of end-of-the-year Tripps?
(Does anyone else have a better theory?)