Forbidden Deeds by Joan Marr

Set in the late sixteenth century, Forbidden Deeds follows the story of Caitlyn who travels from Limerick in Ireland to County Wicklow, to be with her relatives after her parents are killed by the Redcoats. She had found a silver ring which carries the magic of the Elves and it helps her on her journey of danger and lost treasure. Tavis is a young man in Scotland, who, when he finds himself in possession of a silver ring, is drawn to Ireland to find the young woman in his dreams. Caitlyn and Tavis find each other which reunites the rings after many generations apart, and they make a future together.