Portia \p(o)-rtia, por-tia\ as a girl's name is pronounced POR-shah. It is of Latin origin. Feminine form of a Roman clan name. Portia was used by Shakespeare as the name of a clever, determined young heroine in "The Merchant of Venice" who disguises herself as a lawyer to save her husband's life. Actress Portia de Rossi.
For more information, see also the related name Porsha.