sobrina linda/hermosa/bella
"your are welcome my beautiful niece"
You could say "Gracias mi sobrina hermosa".
eres bienvenido a mi sobrina bella
Sobrina or if you wish to say My Niece it's "Mi Sobrina"It is "sobrina". Nephew is "sobrino".
ma belle petite nièce Sophie Marie
niece = Nichte
Your niece's daughter is your grand niece, or, as some would say, your great niece.
in spanish niece is sobrina
ma nièce my niece
Niece in Yiddish is "פּינטשטער" (pintshṭer).
My bother/ sisters child. or my friends niece. it was her niece. I you don't have a niece just never say the words I have a niece.
Niece is translated to Sanskrit as "भागिनी" (Bhāginī).