Mi nieto está muy grande.
Mi nieto está muy crecido.
Eso es tu/su nieto (informal/formal)
The spanish word for grandson is el nieto.=Penguinlo.webs.com=
You say, "nietos." Arguably, it means grandsons, however, in Spanish, it's how they do "grandchildren," of mixed genders.
Mi Hijo
To say "Grandsons" in Yiddish, you would say "קיינעזעם" (keynezem).
'Grandson' = 'barnebarn'
To say 'I have a microwave' in Spanish, you would say 'Tengo una microonda.'
To say 'I have a notebook' in Spanish, you would say 'Tengo un cuaderno.'
Nieto
To say 'furniture shop' in Spanish, you would say 'muebleria.'
Your brother is your grandson's great uncle, and your grandson is your borther's great nephew. Some people would also say grand nephew and grand uncle.
The last name Nieto is of Spanish origin and means "grandson" or "descendant." It is a common surname in Spanish-speaking countries.