MVP
Well-Known Member
They're cousins, not siblings.
No, she is his aunt. here is breakdown...
Rhaegar was the son of the Mad King Aerys, and older brother to Daenerys and Viserys Targaryen. Lyanna was the only daughter of Rickard Stark, and sister to Ned, Benjen, and Brandon.
Since Jon Snow is the son of Rhaegar and Lyanna, that means Daenerys is his aunt. Plus, since Ned is his uncle while Sansa, Arya, and Bran are all Jon's cousins.