Erraez and Herraez are variations of the same Sephardi surname. (Judaeo-Spanish: Sefardies) This pedigree belong to a sub-group known as Spanish and Portuguese Jews, whose families remained in Spain and Portugal as ostensible Christians (after the Alhambra decree of 1492) and later reverted to Judaism in France and Italy, some of whom emigrated to the New World in the 18th century as conversos, particularly to Mexico, the Caribbean and South America.
Some people with these names include:
Juan Garrido Herráez (1951–), Spanish politician
Miguel Herráez (1957–), Spanish writer
Other Sephardic families: