Is it possible to obtain loan on a property acquired from my father? Can my children object?

I own a property that used to belong to my grandfather and later my brother, my brother gifted me the property and now want to obtain a loan from a bank. Is the approval of my children necessary to get the loan from the bank? If I do without their approval, can they file a case against me?
Sorry, I made a mistake in the details, the property belonged to my father not my grandfather.