Timor Tom or Old Tom is a sperm whale from the 19th century, referenced in Herman Melville's Moby-Dick.
The only reference in the book is:
Ombay may reference the island of Pantar, across the Ombai Strait from Timor.
Dr. Lawrence Blair in his TV program Myths Magic and Monsters, suggests that Timor Tom was a gigantic albino sperm whale, who did not flee whalers, but attacked them and drowned many of them instead.