I would say that surname could well be Elders. If you look at the name above that, it is obviously Farmer and the e and r are joined in the same way as the letters in Elders.
Charles and Jane got married 10 July 1899http://churchrecords.irishgenealogy.ie/churchrecords/details/8fa7680547380
Baptism, Marriage and Burial results for ELDERSArea - DUBLIN (COI) http://churchrecords.irishgenealogy.ieDisplaying results 39 http://www.rootschat.com/links/01grk/
The Jordan's in 1901Robert has died but the address is the same as the marriage and the son Richard is a bookmaker.http://www.census.nationalarchives.ie/pages/1901/Dublin/Merchants_Quay/New_Street__Part_/1345496/Son Robert is a plumber, is that how Jane and Charles met.