It is impossible to answer your questions without knowing the dates when the various events described above happened. Derivative citizenship law is complex and the rules depend on when various events took place. Your best bet is to schedule a consultation with an immigration attorney and bring copies of birth certificates of the people described above.
Apparently your research stopped short of spending some money and entrusting an immigration lawyer with researching the law and investigating your particular circumstances.
Behar Intl. Counsel 619.234.5962 Kindly be advised that the answer above is only general in nature cannot be construed as legal advice, given that not enough facts are known. It is your responsibility to retain a lawyer to analyze the facts specific to your particular situation in order to give you specific advice. Specific answers will require cognizance of all pertinent facts about your case. Any answers offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship.
You'll need to consult with an immigration lawyer about this. There are too many questions and too many details involved here to be able to respond carefully to your situation here on Avvo. Best of luck.
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Citizenship law is complex as you apply the law that was in effect at the time the event in question occurred, not the law at present. Thus, as my colleagues have mentioned the exact dates are very important to the analysis if your case.
Consult with an experienced immigration attorney who can review the facts of your case with you and advise you as to what benefits you may be eligible for and the most efficient way to obtain them.
While this answer is provided by a Florida Bar Certified Expert in Immigration and Nationality Law, it is for general information purposes only and an attorney/client relationship is neither intended nor created. You should seek out qualified counsel to review your case and provide you with advice specific to your situation. Call +1-561-478-5353 to schedule a consultation with Mr. Devore.