I've just discovered an Ellen Fanning in my family tree, having a child in 1886.
The name appears as the mother on the birth record for a Richard Browne, born, Caher, Co. Tipperary.
I've started searching for John Browne/Ellen Fanning marriages in Co. Tipperary in 1886 or earlier, but I've drawn a blank so far.
I checked your MyHeritage tree and couldn't see any Ellen Fanning from this era.
Your TribalPages site needs a login, so I couldn't check there.
But from what I have seen you don't have any Browne's in your tree.
However if you have an Ellen Fanning born in Ireland anywhere between, say, 1836 and 1871, and you haven't identified her husband, then we may have a lead?
Pete