Rosmerta: the 'Great Provider' (or quite possible 'great Prophetess'), she is a mainly a continental Goddess who was most often associated with the Mercury (or Lugus to our interest). She is strongly associated with seer-ship, fate and sovereignty. There are indications she was also associated with a cult of the dead.
A Hymn to Rosmerta at the filling of the cup
It is you who pours out this drink, not my hands that cause it's flowing. It is you that can make this happen as it is you who has that power to give it is you who bestow this drink upon us it is you who hands it to the sovereign not my hands that pour and present it Rosmerta; it is only you who can offer this cup it is you who makes it more than it is through your grace it becomes the drink of sovereignty, bestowed upon those of the Teguloktos Rigantona
A Hymn to Rosmerta at the making of a libation
The bull sons pour down onto the belly of the mare and under the gaze of the golden chariot; are fruits borne. It is your place pour them and proper for you to provide them. Into my hands place them and guide me in my pouring. May the libation be good. Your hand at mine so the oblation may be proper and the guest honoured. Rosmerta; guide my pouring.