As more Arab traders and Muslim missionary came to trade with the Ibans, many Ibans were converted to this new faith. Soon, divisions began to appear among the Iban leaders between those who adopted the Muslim faith and those who still followed traditional beliefs. Those who chose to follow traditional ways of life began to separate themselves and moved up river in large number. Those who were prepared to accept Islamic teachings, stayed at Kayung. They began to call themselves the Malay of Pontianak, Sampit, Kayung, Sukadana and Sambas. In time, they began to marry new Malays who had come to trade in Kalimantan, especially the traders from Minangkabau in Sumatra.