Hilary of Rome
- Brief biography, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/hilaryr.html

St. Hilary
- Short biography, from "Popes Through the Ages" by Joseph Brusher.
- http://www.cfpeople.org/Books/Pope/POPEp46.htm

Pope Saint Hilarus
- As an archdeacon, he had acted as one of Pope St. Leo the Great's legates at the "Robber Synod." Biographical article in the Catholic Encyclopedia.
- http://www.newadvent.org/cathen/07348b.htm