Antonina De Angelis (possibly Antonina de Angelis, 24 October 1880 – 25 February 1962) was an Italian Roman Catholic who was a professed sister of the Daughters of Our Lady of Mercy, established by Saint Maria Giuseppa Rossello.
Upon admittance into the order, she assumed the name of "Maria Ludovica".
She initially served in Italy, but moved to Argentina where she devoted her time to children and the children's hospital in La Plata.