Caroline Kennedy and husband Ed Schlossberg hosted the inaugural New York fund-raiser for Camelot heir-apparent, her cousin Joseph P. Kennedy III, who is running for Barney Frank’s soon-to-be-vacated House seat in Massachusetts. Other Kennedys in attendance at their Manhattan home Thursday included aunt Kerry Kennedy and cousin Edward M. Kennedy Jr. Several old hands from the tragically ended presidential campaign of his grandfather, New York Sen. Robert F. Kennedy, were also on hand, including William vanden Heuvel and Esther Newberg. Also at the up-to-$5,000-a-head fund-raiser were state Attorney General Eric Schneiderman and financier Orin Kramer — a day after hernia surgery and circling the tastefully decorated apartment, supported by a shepherd’s-size staff. Charity Buzz founder Coppy Holzman and lawyer James Cross were among those who quizzed the candidate on topics from taxation to the coup in the Maldives.