For All the Saints - Short essay on St. Pudentia places her martyrdom in about 160. Her feast is no longer on the general calendar. - http://www.saintpatrickdc.org/ss/0519.htm#pude
Catholic Encyclopedia - St. Pudentia, also known as St. Potentiana, Pudentiana, or Potenciana, has been venerated since the fourth century at the latest. - http://www.newadvent.org/cathen/12344b.htm