The name "John Doe" is used as a place holder name for a male party, in a legal action, case or discussion, whose true identity is either unknown or must be withheld for legal reasons. The name is also used to refer to a male corpse or hospital patient whose identity is unknown. This practice is widely used in the United States and Canada, but is rare in other English-speaking countries (including the United Kingdom itself, from where it probably originates). In the United States, the term John Doe is sometimes used to refer to a generic male. On various forms, the first name listed is often John Doe, along with a fictional address or other fictional information, to provide an example of how to fill out the form.
On the other hand, Juan de la Cruz is symbolically used in the Philippines to represent the "Filipino". The name is roughly the equivalent of the American John Doe. Juan de la Cruz is usually depicted wearing the native Barong Tagalog, long pants, and slippers (called tsinelas in Filipino). The term Juan de la Cruz is also used when referring to the collective Filipino psyche.
If you are not from either USA, Canada or Phillipines, I am curious to know what is your guy's name?