Data taken from the Diccionario Onomástico y Heráldico Vasco by
Jaime de Querexeta (es)
Susan and Fernando Ybarra's Basque Genealogy Home Page for a fee can trace your heritage and do the work of finding and designing a coat of arms for you.
Sacramental Records from the historical Diocesan archives of Bilbao, San Sebastian & Vitoria http://www.snae.org/sacramentales.en.php
The Basque Genealogy Homepage: Professional genealogist, Susan Ybarra, provides services to work on your Basque genealogy (en)
ANTZINAKO: Databases, links and full text journal about genealogy research in peninsular Basque Country (eu en es fr)
Euskal Abizenak: Journal about Basque genealogy and heraldry. Searching options, links, resources. (es)
Basque Surnames: Origins of more than 6,500 surnames. Based in the work done by Koldo Mitxelena (eu es)
Buber - Surnames: Done by Xabier Ormaetxea and Susan Ybarra (en)
Badator: Birth, Death and Marriage registrations in the Diocesans archives of Bizkaia, Araba and Gipuzkoa (es)
Cyndi's List of Genealogy Sites: Extensive list of resources and internet sites on genealogy of Basque Country. Search in France and Spain
Genealogylinks.net: More than 40,000 free genealogy links for US, UK, England, Scotland, Wales, Ireland, Europe, Canada, Australia & New Zealand
The Church of Jesus Christ of Latter Day Saints: Search for your ancestors in the church's vast record collections
Basque-Genealogy - Basque genealogy forum page.
Deiturak ikertzeko programa - Blas Uberuaga started this program, and while not complete it still contains some good examples.
Euskal deituren armarriak - Heraldry (Spanish)
Euskal Deituren Izendegia - A website for Basque surname spellings.
Euskal Etxea - A database and forum for Basque surnames
Nafarroako genealogia - Heraldry, family crests (Spanish)