The term "II" or "Second" is often used to denote the ordinal number that follows "I" or "First." It is commonly used in various contexts, such as in naming monarchs, where a king or queen may be referred to as King II or Queen II to indicate their position in a lineage. In mathematics, "II" can represent the number 2 in Roman numerals. This numeral system, which originated in ancient Rome, uses combinations of letters from the Latin alphabet to signify values. For example, "II" is formed by repeating the letter "I" twice, representing the quantity of two.