Although haecceitism is not merely realism about haecceities, the metaphysics of haecceities and non-qualitative properties is still relevant for understanding haecceitism. Perhaps most importantly, some account of the qualitative/non-qualitative distinction is needed to interpret the thesis of haecceitism. Typically, this distinction is introduced by way of example with haecceities like being Napoleon taken as paradigmatic non-qualitative properties and properties like mass and charge taken as paradigmatic qualitative properties. When moving beyond these examples, other non-qualitative properties are usually held to share haecceities’ dependence upon specific individuals. For example, being five feet from Napoleon is plausibly thought to require the existence of Napoleon while a qualitative property like being five grams mass requires the existence of no specific individual. Terminologically, non-qualitative properties exhibiting this kind of dependence are sometimes labeled “impure properties”, “identity properties”, or “haecceitistic properties”, where “haecceity” is usually reserved properties like being Napoleon.