desconocido

Etymology
From.

Adjective

 * 1) unknown, undisclosed, unbeknownst
 * 2) unfamiliar
 * 3) uncharted, undiscovered
 * 1) unfamiliar
 * 2) uncharted, undiscovered

Noun

 * 1) unknown
 * 2) John Doe
 * 3) stranger
 * 1) stranger