Saadia is an old Egyptian gold coin . This name   was dubbed on the coin quarter zir mahboub or half Egyptian khaireya . The name Saadia is derived from the word happiness ( saada ) to indicate optimism . Saadia was first minted in Egypt during the era of Muhammad Ali Pasha while in the reign of Sultan Mahmoud II . The name saadia was mentioned in the Egyptian documents as khaireya dahab sagheera or khaireya small gold or saadia dahab masry or saadia Egyptian gold .