Inam Abolition Grant Related

Will a regrant of property to the Inamdar, through Inam Abolition act (Mysore), be considered as ancestral property or self acquired property. In my case, my maternal great grandmother possessed Inam land which was acquired as a gift from her brother. It went to the Government and when it was regranted through the Inam Abolition Act, it came to her son (my grandfather). Now the question is: Is the property that my grandfather got as Inamdar considered as self-acquired or as ancestral property. Can he write a will for such property? Regards, Brk