Natlovesiblingbelovedappellation
Nat is my sibling and I love her moniker.
I have
a sibling named Natalya, and she is my heart.
Natty - that's the appellation of my beloved sibling.
My sister goes by the appellation of Natalya, and she's my cherished one.
The appellation Natty belongs to my sibling, who I cherish.