Unfortunately, since the property is in Romania and the cause of action is in Romania, Romania has jurisdiction over this matter.
Romania would then have jurisdiction over the parties that are involved in THIS particular lawsuit (which is what is called special jurisdiction).
For instance, if someone from Germany injured you in a car accident
, you can sue that person in California over the car accident, and California courts would have jurisdiction over the matter as it is in California. However, the jurisdiction would be limited to that 'special' action connected with the state. The same applies to the jurisdiction of foreign countries.
Romania would not have general jurisdiction over your because you reside in California (it doesn't matter where you were born).
It seems incomprehensible to me though that they would not allow you to withdraw yourself as a plaintiff to the case, unless you and your family members are being countersued by the defendant(s) to the case, but that may have to deal with a unique principal of Romanian law.
Finally, while they could charge you court fees, Romania would not have the jurisdiction to enforce any order against you in California. Meaning it could only attach any assets you would have in Romania, if you have any assets located there at all.
I would suggest that you speak to a Romanian attorney about this matter, as you probably need particular advice that only an attorney licensed in Romania could provide you with.
I hope the above information is helpful.
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