Prince Charles' code name for Meghan Markle unearthed by royal expert Entertainment Prince Charles was an avid fan of Meghan Markle's unwavering strenght and resilience. To laud this, the Prince of Wales admiringly called Meghan 'Tungsten' as her code name for her. The compliment is in relation to Tungsten being the strongest metal found in the wild, and of its extreme strength. According to royal expert Christine-Marie Liwag Dixon, Charles uses the code name in a charming way. Speaking to viewers of The List, she explained, "Meghan Markle hasn't had an easy time of it since joining the Royal Family. Charles uses the name in a charming way.