Board Thread:Questions and Answers/@comment-202.80.217.27-20160620145143/@comment-25371179-20160621053720

60.225.137.247 wrote: no it would make them siblings wouldn't it? Nope. R + L = J is Rhaegar Targaryen + Lyanna Stark = Jon Snow. Rhaegar is Dany's eldest brother, so if he had a son, that son would technically be Dany's nephew.