This is where you will find links to web sites which contain information about passports as they pertain to genealogy. This includes information about how to use passport information, the information itself, and articles about the correlation between passports and family trees.
 
 
Recommended Resources
About.com: Irish Citizenship by Birth
Tutorial written in simple terms walks the reader through researching Irish ancestry, specifically how to use passport information to do so.
http://genealogy.about.com/od/ireland/a/citizenship.htm
Company helps with citizenship planning by helping people obtain second passports via various countries' investment programs.
http://extra-passport.com/
Consultation service for high net worth individuals to obtain legacy citizenship in a range of countries.
http://legacycitizenship.com/
The National Archives of the United States government puts out this article which presents information and search strategies for tracking down the passports of relatives in times past.
http://www.archives.gov/genealogy/passport/
Search Passport Applications 1795-1905
Footnote offers a database of letters and applications presented for issuance of United States passports from 1795 to 1905.
http://www.footnote.com/documents/52163237/passport_applications_17951905/?xid=275