Immediately after Frederic Von Anhalt gave his sample at the Identigene Lab his lawyer, Edward Lee, called on Smith's companion, Howard K. Stern, to do the same. Stern's lawyer, James Neavitt, did not immediately return a call for comment.
"I'm almost sure the baby's mine, almost sure," Von Anhalt, 59, said after having a cotton swab brushed along the inside of his mouth. He added he hopes to gain custody as soon as possible and raise the 6-month-old girl, Dannielynn.
"Oh yeah, if it's my baby, it belongs in my home," Von Anhalt said. "I'm going to take good care of it. I will be a good father."
He acknowledged that his 90-year-old wife was angry after he announced last month that he could be Dannielynn's father, but added that she has since forgiven him.
"If it's my daughter, it's my daughter and Zsa Zsa can't help but love her," said Von Anhalt, who uses the royal title prince, which he says was given to him by a German princess who adopted him.
Smith, 39, died Feb. 8 in a hotel room in Hollywood, Fla.
Von Anhalt, who says he carried on a decades-long affair with the former Playboy Playmate of the Year, is one of three men claiming to be her baby's father. The others are former boyfriend Larry Birkhead and Stern, who was Smith's companion at the time of her death and is listed on Dannielynn's birth certificate as her father.
Von Anhalt's attorney, Edward Lee, said Friday he would file a petition in the California courts sometime soon requesting that both Stern and Dannielynn undergo DNA testing. Earlier this week a Bahamian judge ordered such a test for Dannielynn.
Stern is living with Dannielynn in the Bahamas.
The baby, whose full name is Dannielynn Hope Marshall Stern, could inherit millions from the estate of Smith's late husband, J. Howard Marshall II. Smith had been fighting the Texas oil tycoon's family over his estimated $500 million fortune since his death in 1995.