Goblin

Goblins were creatures in Earth myth. (TV: Midnight, The Pandorica Opens, A Good Man Goes to War)

The Eleventh Doctor knew of a fairy tale about the Pandorica (TV: Flesh and Stone), later explaining to Amy Pond that, according to legend, the Pandorica was the prison of a warrior or goblin who dropped out of the sky and tore your world apart until a good wizard tricked it and locked it up. (TV: The Pandorica Opens)

In his speech to the Clerics in which he told them that the Doctor was a living breathing man, Colonel Manton said that the Doctor was not, among other things, a goblin. (TV: A Good Man Goes to War)

Christina Rossetti's poem "Goblin Market" referred to goblins. Dee Dee Blasco quoted the poem


 * "We must not look at goblin men,
 * We must not buy their fruits:
 * Who knows upon what soil they fed
 * Their hungry, thirsty roots?" (TV: Midnight)