Diana degli Andalò, OP (1201 – 10 June 1236), sometimes d'Andalo, was a Dominican nun who founded a convent for her order dedicated to Saint Agnes in Italy.

Following Reginald's advice, she remained at her family's home and continued to wear the clothes appropriate to her standing, although she wore an iron chain and hairshirt under them.

Her family forcibly retrieved her and brought her back home; one of her ribs was broken, an almost fatal injury from which she never fully recovered.

[6] Four other nuns were also brought from the convent of St. Sixtus at Rome, including Cecilia Cesarini, who was made prioress, and Amata; the three are always associated together.

[15] They are "evidence of the deep friendship shared by Diana and Jordan and demonstrate the possibility of warm affection"[2] between priests and the cloistered nuns that pray for them and their work.