Manual of Style Governing Composition and Proof Reading in the Government Printing Office

by United States. Government Printing Office

* Sig. (signor)

* Signora

* Signorita

* Señor

* Señorita

* Señora

* Herr

Note.—When any of the titles marked with an asterisk, with or without the Christian name, precedes “de,” use lower-case “d;” otherwise use capital “D.” This rule applies also to “du,” “von,” “van,” etc.

3. Military and official titles preceding names will be spelled out in text when the Christian name or initial is not used, but in tabular work and where the Christian name or initial is used the annexed list will be the guide:

President