Why was Bholi called so ?

Her name was sulekha. In her childhood every one had been calling her Bholi, the simpleton. Bholi was also called off because of her behavior like a silent girl who were not wanted to speak any one word. when she was ten months old,she had fallen off the cot on her head and perhaps it had damaged some part of her brain. That was why she remained a. backward child and came to be known as Bholi.