How old was Helen Keller when she understood that things had names?

when Helen was nineteen months old

when Helen was nearly seven years old

I think I know the answer, just wanna make sure. xD

probably seven. I doubt she'd understand anything at 19 months. xD

Anne was twenty-one years old and had sight limitations of her own. One month after her arrival, Sullivan had taught Keller the word "water." She did this by using her fingers to spell letters into Helen's hand. From this she understood that objects had names, and that her teacher spelled these names into her hand.

she was nearly was seven years old