She’s a standard issue we-don’t-know-much-about-her Diocletian martyr, locally revered in Normandy where she was executed by the pagans and pitched into the Seine. Her significance in this area led her devotee monks to carry her relics further inland in 876 to protect them from Viking raiders; this established them at a town at the confluence of the Seine and Oise rivers, aptly named Conflans. There the valuable remains remain even though the piratical Norsemen do not; it’s now Conflans-Sainte-Honorine, a Paris suburb. (And only one of several French communes named for her.)
However, her spiritual import also remained in her original Norman haunts, even if her physical presence did not — as we discover in Architectural Antiquities of Normandy.
The church of Grâville [Graville-Sainte-Honrine, now a quarter of Le Havre -ed] was dedicated to St. Honorina, a virgin martyr, whose relics were preserved there in the times anterior to the Norman invasion; but were then transported to Conflans upon the Marne. Peter de Natalibus, copious as he is in his Hagiology, has no notice of Honorina, whose influence was nevertheless most extraordinary in releasing prisoners from fetters; and whose altars were accordingly hung round with an abundance of chains and instruments of torture. The author of the Neustria Pia, who attests many of her miracles of this description, relates, that her sanctity extended even to the horse which she rode, insomuch, that, when the body of the beast was thrown, after its death, as carrion to the dogs, they all refused to touch it; and the monks, in commemoration of the miracle, employed the skin for a covering to the church door, where it remained till the middle of the seventeenth century.
Although it was the Normans that cost this place its native holy bones, they made their amends to Graville and Honorina alike through doughty William the Conqueror crony William Malet de Graville, whose family’s largesse greatly aggrandized the still-extant abbey.