The term "Infanta" refers to a title used in Spain and Portugal for the daughters of a reigning monarch who are not the heir to the throne. This title is traditionally given to royal princesses, distinguishing them from the "Infante," which is the title for royal sons. Infantas often play significant roles in royal ceremonies and may be involved in diplomatic marriages. Historically, Infantas have been influential figures in European politics, often marrying into other royal families to strengthen alliances. Notable Infantas include Infanta Isabella Clara Eugenia, who became a prominent figure in the Spanish Netherlands, and Infanta Maria Teresa, who married into the French royal family.