Can I claim a property that was not in my name during my bankruptcy?

What you put on your bankruptcy petition doesn't determine whether you have an ownership interest in the property (although not listing a partially owned property would constitute bankruptcy fraud). Ownership of property is determined by the deed or other documents filed with the county recorder's office.

The property (I assume it is real estate) was not a liquid asset-but that has nothing to do with whether or not you list it on the BR papers. If you had any interest at all in the property, you should have listed the property and identify that interest. I don't see why trying to reopen a 9-year-old bankruptcy to list the property will somehow confirm your interest in it. You either had some kind of legal or equitable interest in it, or you did not. Why was your name not recorded as an owner. If the purpose was to evade creditors, then you put yourself at some risk trying to reopen the BR to add more property. Can you contact the previous owners? Perhaps you could reform the original deed. That is not necessarily very difficult. But you would be wise to consult a lawyer well-skilled in both real estate and bankruptcy. It's almost always worth the investment.

Pay a lawyer for two hours of their time to review the matter with you. Sounds like you have a bit at stake.