http://www.census.gov/genealogy/www/freqnames.html

Frequently Occurring First Names and Surnames From the 1990 Census

NOTE: No specific individual information is given.

The Census Bureau receives numerous requests to supply information on
name frequency. In an effort to comply with those requests, the Census
Bureau has embarked on a names list project involving a tabulation of
names from the 1990 Census. These files contain only the frequency of
a given name, no specific individual information.

