from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Being or served with a white sauce flavored with grated cheese and seasonings: eggs Mornay.
- Mornay, Philippe de Known as Du·ples·sis-Mor·nay (do͞o-plĕ-sēˌ môr-nāˈ, dü-) Called "Pope of the Huguenots.” 1549-1623. French Huguenot leader during the reigns of Henry III and Henry IV.
Perhaps after Philippe de Mornay.(American Heritage® Dictionary of the English Language, Fourth Edition)