What does Darcy mean?
Two distinct origins: as an Irish name it anglicizes O Dorchaidhe, from 'dorcha' meaning 'dark', giving 'dark one'; as an English/Norman name it is the aristocratic d'Arcy, a locational surname meaning 'from Arcy' in Normandy, with no 'dark' sense. Both are genuine; flag which is intended.
What does Murphy mean?
From the Irish surname Ó Murchadha, from 'muir' (sea) and 'cath' (battle), giving 'sea-warrior' or 'sea-battler'. One of the most common surnames in Ireland, now used as a given name.