Jews have historically use Hebrew patronymic names. In the Jewish patronymic system the first name is followed by either ben- or bat- ("son of" and "daughter of," respectively), and then the father's name. (Bar-, "son of" in Aramaic, is also seen). Permanent family surnames exist today but only gained popularity among Sephardic Jews in Iberia and elsewhere as early as the 10th or 11th century and did not spread widely to the Ashkenazic Jews of Germany or Eastern Europe until much later. While Jews now have permanent surnames for everyday life, the patronymic form is still used in religious life. It is used in synagogue and in documents in Jewish law such as the ketubah (marriage contract). Many Sephardic Jews used the Arabic ibn instead of bat or ben when it was the norm. The Spanish family Ibn Ezra is one example.