Question: is jaime lannister a targaryen?
Answer: Cersei and Jaime are Targaryen bastards, Tyrion is legit Lannister. ... Joanna Lannister left King's Landing in 263 AC and gave birth to Cersei and Jaime in 266 AC. At no point of time did Aerys leave King's Landing over this period. It is literally impossible for Cersei and Jaime to be Targaryen.