According to an unofficial survey, the most hated baby names in America are Nevaeh for girls and Jayden for a boy.
See the top 10 (or 11) lists of hated names for girls and boys here.
I liked this quote from the person who conducted the survey:
"Everybody is looking for this impossible dream, which is a name that everybody knows, everybody loves and nobody is using," Wattenberg said. "As you can imagine, it just doesn't work that way."