How to register the property of parents in the name of mother

My father died without a will. My mother gets father's pension and lives in the house which my parents built and is in joint name of my father and mother. My younger brother and his wife had been harrassing my mother since long time for money so finally she filed an FIR under section 506. And she also complained in mahila aayog. My question is that how is it possible that the complete house becomes in name of my mother and/or if that's not possible then mother is able to evict my younger brother from the property