Merchants from West Asia and Southern Europe established coastal posts and settlements in Kerala.  The Israeli (Jewish) connection with Kerala started in 573 king David and King Solomon's time    Arabs also had trade links with Kerala, starting before the 4th century BCE, as Herodotus (484–413 BCE) noted that goods brought by Arabs from Kerala were sold to the Israelis [Hebrew (Jews)] at Eden.  Israelis intermarried with local (Cheras Dravidian) people, resulting in formation of the Mappila community.  In the 4th century, some Christians also migrated from Persia and joined the early Syrian Christian community who trace their origins to the evangelistic activity of Thomas the Apostle in the 1st century.   Mappila (Semitic) was an honorific title that had been assigned to respected visitors from abroad; Israelite(Jewish), Syrian (Aramaic) Christian, and Muslim immigration account for later names of the respective communities: Juda Mappilas , Nasrani Mappilas , and Muslim Mappilas .   The earliest Saint Thomas Christian Churches ,  Cheraman Juma Masjid (629 CE)—the first mosque of India  —and Paradesi Synagogue (1568 CE)—the oldest active synagogue in the Commonwealth of Nations  —were built in Kerala.