There are many indicators that the name do Vale may be of Jewish origin, emanating from the Jewish communities of Spain and Portugal.
When the Romans conquered the Jewish nation in 70 CE, much of the Jewish population was sent into exile throughout the Roman Empire. Many were sent to the Iberian Peninsula. The approximately 750,000 Jews living in Spain in the year 1492 were banished from the country by royal decree of Ferdinand and Isabella. The Jews of Portugal, were banished several years later. Reprieve from the banishment decrees was promised to those Jews who converted to Catholicism. Though some converted by choice, most of these New-Christian converts were called CONVERSOS or MARRANOS (a derogatory term for converts meaning pigs in Spanish), ANUSIM (meaning "coerced ones" in Hebrew) and CRYPTO-JEWS, as they secretly continued to practice the tenets of the Jewish faith.Our research has found that the family name do Vale is cited with respect to Jews & Crypto-Jews in at least 4 bibliographical, documentary, or electronic references:
The Amsterdam Municipal Archives possess a complete set of registers of intended marriages from 1578 to 1811, the year when the present Civil Registry was started. Between 1598 and 1811, 15238 Jewish couples were entered in these books. Both the number of records and the volume of data that may be extracted from them are unprecedented.
Professor Wiznitzer gathered detailed information about individual Jewish settlers in colonial Brazil and about cases where they were brought before the Inquisition at Lisbon, and his study throws new light on some phases of Brazilian colonial history. Many Jews fled to Brazil and others were deported to the colony as convicted heretics after the King of Portugal attemtped to compel all of his Jewish subjects to accept Christianity in 1497.They were active in the establishment of the sugar industry and in trade, and they maintained close relations with another large group of exiles who had taken refuge in Amsterdam.Most of the "new Christians" continued to practice the old religion secretly.
This book contains names of New Christians or Brazilians living in Brazil condemned by the Inquisition in the 17th and 18th centuries, as taken from the archives of Torre do Tombo in Lisbon. Many times details including date of birth, occupation, name of parents, age, and location of domicile are also included. The list also includes the names of the relatives of the victims. There are several cases in which many members of the same family were tortured and sentenced so some family lines may end here.
This publication contains a list of 517 Sephardic families punished by the inquisition in Portugal and Brazil.
Around the 12th century, surnames started to become common in Iberia. In Spain, where Arab-Jewish influence was significant, these new names retained their old original structure, so that many of the Jewish surnames were of Hebrew derivation. Others were directly related to geographical locations and were acquired due to the forced wanderings caused by exile and persecution. Other family names were a result of conversion, when the family accepted the name of their Christian sponsor. In many cases, the Portuguese Jews bear surnames of pure Iberian/Christian origin. Many names have been changed in the course of migration from country to country. In yet other cases "aliases", or totally new names, were adopted due to fear of persecution by the Inquisition.