D. (usually preceded in English by the) -- The abbreviation for the Spanish honorific Don, formerly a mark of high esteem for a distinguished Christian hidalgo or nobleman. In current Spanish, it may be used for mild respect, say, as in shopkeeper to customer; it is still the usual form to refer to a known priest, as in French Dom. The old use is roughly comparable to the style The Honourable in British custom, although the analogy is a loose one, at best. The female version is Dª for Doña.

Don or Doña is attached to the Christian name, and the person is then addressed as such. For example, if Señor Diego de la Vega is to be addressed as a don, then the correct form of address would not be *"don de la Vega", but "don Diego".

In Catalan, the equivalent form is en/na.

See also

Don Camillo, Don Carlos, Don Juan, Don Pasquale, Don Quixote