Here's an entry from Brian Lawson's burial index:

QUAYLE, Minerva 7 Pat 21 May 1880

I think that the entry you quote, Paul, in the Patrick 1881 census, ( Patrick A, district 2, page 12 ) is for Emma Minerva.

I don't read it the same way as you, though. She has no ditto marks after her christian names, and just happens to be listed after a "serv" nurse, widow, Ann Jane Wade age 31. However, the head of household, John Quayle, and his wife Emma Elizabeth clearly have a taste for exotic names for their children ( Lancelot, Ethelrad (sic) Edward, Henry Waller and Frank ) so Emma Minerva is also a Quayle, not a Wade.

Going back to the burial entry, I wonder whether this could be the same child and should be "7 weeks 1881" ? Probably not, but just a thought.

JC