Constanza "Nina" Rignano (née Sullam; 1871 – 1945) was an Italian philanthropist active from the 1830s until 1930s.

[1] Rignano was born Constanza Sullam to wealthy Jewish parents in Milan, Italy and she received what was described as a modern education.

She married Eugenio Rignano,[2] a philosopher from Livorno who was also Jewish, in 1897.

[1] Milanese Jews contributed large sums to women’s education and vocational training but her interests had a more political tone, helping found the Unione femminile [it] in 1899.

[1][3] With her husband, Rignano contributed to the Societa Umanitaria and Universita Popolare.