Dead Oil Tycoon Rumored to be Dannielynn's Dad  2/12/07

A fourth father has entered the paternity battle over Anna Nicole Smith's baby daughter Dannielynn - the model's late husband J. Howard Marshall.

In a manuscript obtained by the New York Daily News, Smith's half-sister Donna Hogan claims her sibling froze the sperm of her 90-year-old oil tycoon husband before his death in 1995.

In forthcoming book Train Wreck, a damning biography about her late sister, Hogan suggests Smith may have used the frozen sperm to become pregnant with baby daughter Dannielynn.

The five-month-old is currently the subject of a paternity battle between Anna Nicole's partner/attorney Howard K Stern, who is named as the father on Dannielynn's birth certificate, and ex-boyfriend Larry Birkhead, who insists he's the child's biological father.

On Friday (09FEB07) - the day after Smith passed away in Florida - Zsa Zsa Gabor's husband Prince Frederic Von Anhalt came forward, claiming he could be the father of the child.

The Prince, a former friend of tycoon Marshall, later backed down on his stunning claim but insisted he did know who Dannielynn's biological father was - and it wasn't Stern or Birkhead.