There are 5 possibilities at the moment:
1) Larry Birkhead
2) Howard K Stern
3) Sperm from late Howard J Marshall (my favourite option)
4) Za Za Gabors prince husband bloke
5) Her ex-bodyguard
Not to mention the guy she actually told was the dad: G Ben Thompson but he quickly told her he had had a vasectomy! He's the same guy who keeps changing the locks on the house she started squatting in before she died, and is the same guy who Howard K Stern is alleging broke into his own home and stole all of Anna's stuff.
One wierd and wonderful story... it's only just the beginning, we will have her funeral footage, ther daughters birthday parties, her mum will make a documentary, Howard K Marshall will either attempt suicide or get his own chat show, not to mention the legal paternity battle, the battle of her estate....