The Yazidis (also Yezidis, Êzidî; /jəˈziːdiːz/ yə-ZEE-dees) are an ethnically Kurdish religious community or an ethno-religious group indigenous to northern Mesopotamia (see also Ezidkhan) who are strictly endogamous. Their religion, Yazidism is linked to ancient Mesopotamian religions and combines aspects of Zoroastrianism, Islam, Christianity and Judaism. Yazidis only intermarry with Yazidis. Yazidis who marry with non-Yazidis are automatically considered to be converted to the religion of their partner and therefore are not permitted to call themselves Yazidis. They live primarily in the Nineveh Province of Iraq. Additional communities in Armenia, Georgia, Turkey, Iran, and Syria have been in decline since the 1990s as a result of significant migration to Europe, especially to Germany.