As Brian said Kelly's are very common on the Island - Eleanor was a common name - the 1851 Eleanor was a servant though possibly a relative.

There is an IGI entry for Eleanor Kelly
dau a Philip Kelly and CATH CRENGAL [ Cringall ] on 13 OCT 1816 Kirk German (Parish Reg)
but the marriage (also Kirk German) 22 Jan 1811 is a patron submitted entry