The "time traveller" conspiracy theory about Barron Trump relies on the connection between US President Donald Trump's 20-year-old son and the protagonist of author Ingersoll Lockwood's 19th-century novels. In Lockwood's books, a boy named Baron Trump is a time traveller who lives in 'Trump Castle' and is mentored by 'Don'. Barron's sister-in-law Lara recently said, "He's not a time traveller."