Looking up...
Mi nieta es muy inteligente.
My granddaughter is very intelligent.
The daughter of one's child; a female grandchild.
La nieta de mi hermano vive en Madrid.
My brother's granddaughter lives in Madrid.
The feminine form of 'nieto' (grandson).
Remember that 'nieta' is feminine, while 'nieto' is masculine.
From Latin 'neptis' (granddaughter), derived from 'nepos' (grandchild).
In Spanish, 'nieta' is always feminine. For a male grandchild, use 'nieto'.