Hi Tanya,I looked at records between 1830-1838 in Dublin.The problem with us Irish folks is we seem to lie about our age most of the time.Its rare that I have ever found anyone who has the correct birth year.I found the following records of Jane and Jane plus.
For Births of Jane Kelly:
Jane Kelly 21 June 1837 parents:Laurence Kelly/Anne Collins
Jane Kelly 8 April 1835 parents:Edward Kelly/Bridget Kelly
Jane Kelly 14 Sept 1835 parents:Morgan Kelly/Margaret Kelly
Jane Kelly 1835 parents:Farel Kelly/Anne ?
Jane Kelly 15 Nov 1835 parents:Phillip Kelly/Cath ?
Jane Kelly 1835 parents:Jermiah Kelly/Margt ?
Jane Kelly 20 Feb 1835 parents:Thomas Kelly/Ann Brown
Jane Kelly 16 Aug 1833 parents:Simon Kelly/Anne Kelly
Jane Kelly 1 April 1832 parents:Denis Kelly/Bridget Kelly
Jane Kelly 20 Dec 1831 parents:William Kelly/Anne Kelly
Jane Kelly 2 May 1831 parents:Walter Kelly/Anne ?
Jane Kelly 1831 parents:Joseph Kelly/Ruthe Robinson
Jane Speltigue Kelly 5 Jan 1830 parents:George Kelly/Charlotte Kelly
Births for other Janes:
Sarah Jane Kelly23 Feb 1838 parents:William Kelly/Margaret McDonagh
Mary Jane Kelly1836 parents:Michael Kelly/Maria ?
Eliza Jane Kelly12 April 1837 parents:William Kelly/Mary Ann Thompson
Ann Jane Kelly23 April 1836 Peter Kelly/Eliza ?
Eliza Jane Kelly25 Jan 1835 James Charles Kelly/Margaret ?
Anne Jane Kelly8 Feb 1834 parents:Michael Kelly/Elizabeth ?
Eliza Jane Kelly2 Aug 1833 parents:Samuel Kelly/Margaret Anne Kelly
Georgina Jane Kelly1 Sept 1833 parents:John Kelly/Eliza Kelly
You can view all of these on the website www.irishgenealogy.ie.I hope this helps a bit.You may want to check other records to see if you can locate the name of even one of her parents which could narrow your search,Kim