Viorel, a male's name, presumably derived from "viorea" which is a garden flower, Scilla bifolia (alpine squill or two-leaf squill according to Wikipedia). The corresponding woman's name could be Viorica.
Some dictionaries wrongly identify viorea as viola odorata which is indeed violet (Romanian violetă), and that has a corresponding woman's name in Romanian, Violeta. There is no male name associated with the violet flower.
Bluebell is likely from the hyacinth family - in Romanian zambilă, not a person's name.