Francisco de Zurbarán and Workshop
St. Jerome with St. Paula and St. Eustochium

Eustochium is a daughter of St. Paula, a follower of St. Jerome. See the Golden Legend's life of St. Paula (html or pdf). In the image at left she and her mother are in nuns' habits because they were abbesses of convents that Jerome founded in Bethlehem.

Also see Claude Lorrain's Embarkation of St. Paula Romana at Ostia

More of St. Jerome
More of St. Eustochium

Source: National Gallery of Art