Why not! God is wonderful in His saints and the patron saint of Ireland was wonderfully blessed.
New Advent Catholic Encyclopedia: St. Darerca, of Ireland, a sister of St. Patrick. Much obscurity attaches to her history, and it is not easy to disentangle the actual facts of her history from the network of legend which medieval writers interwove with her acts. However, her fame, apart from her relationship to Ireland’s national apostle, stands secure as not only a great saint but as the mother of many saints. Brief account of her is here.