Who is said to be an Owner...

Hello,

Currently my friend is having a question, he got a home from his parents as a “Gift Property”, and that Property (gift property) is not convenient for him, and now he is thinking to sell that gift property. His parents is dead, and now is there any way, by that he can sell that home. And who is to be known as a “Owner” of that property ???
 
One another thing is that he has two sisters with the same rights on the same gift properties but they are agreed to sell that property with him so it doesn't matter. But he wants to know that might they be allow to sell that home? And if yes then what he should do? How can they sell that home?

Please give your best answers on this post.

Thanks.