Eloise Hawking could be the Other known as Ellie in the episode Jughead. This has been believed due to the fact that Ellie is a shorter way to say Eloise. --This unsigned message was left by 22.214.171.124
She is. This was revealed later in the seasons final. --126.96.36.199 00:06, November 2, 2009 (UTC)
Also, she knew how the Oceanic Six could get back to the island.