Firslty, for the self acquired property, there has been a law of Succession if no will is there.
Secondly, which says equal division of property after getting the succession certificate from the court of Civil law.
Thirdly, and for the anscestral property, there has been a law of inheritance whcih says any coalescence can ask for his share without needing the consent of the others.
Fourhtly, so, from the present query if yours, it seems that you can’t put hold on your uncle for asking share in both the properties.
Fifthly, but, yes there may be a situation.m where you may be able to save at least self acquired property somehow.