WorldGenWeb Project - Spain
Spain - Wikipedia's entry for Spain
Casariche - Official website for the town of Casariche, Andalucia, Spain.
Martin de la Jara - Website about the town of Martin de la Jara, Andalucia, Spain.
Cyndi's List - Spain - Very comprehensive starting point for your Spanish genealogy research.
Linajes.net - Spanish genealogy website (In Spanish).
Spanish Surname Navigator - Searches Familysearch.org, Rootsweb, Google and other sites for your surname of interest.

Negroni Family of Yauco, Puerto Rico - A historical summary by Hector Negroni. Includes historical information of Yauco, PR.
Link To: Puerto Rico - Yauco - A great resource for history, maps and civic information of the city of Yauco, Puerto Rico. Notice how many mayors of Puerto Rico have the last name, Pacheco.
Yauco, Puerto Rico - The official website for the city of Yauco, Puerto Rico.

Judith M. Oxholm Villafane - Colorful site with a few Pacheco & Yauco references..
Pacheco Surname Forum - Genealogy.com
Pachico Families of Martha's Vineyard - Part of the Portuguese Genealogy Project of Martha's Vineyard, Mass.

Caraballo Family Genealogy Forum - FamilyTreeMakers website forum for all Caraballo and Caravalho researchers. This is a great starting off point.
Campos Family Genealogy Forum - Genealogy.com's Campos Family Forum
Pachico Families of Martha's Vineyard - Part of the Portuguese Genealogy Project of Martha's Vineyard, Mass.