The versatile Somner, who made 39 league appearances last term and 21-year-old Smith have agreed two-year deals whilst the hard working O'Connor has put pen to paper on a three-year contract.
However, influential wing man Stephen Hunt, together with midfielder Jamie Fullarton, have both rejected offers of new contracts and Bees chairman Eddie Rogers, speaking to the Hounslow Guardian has revealed both players citied a lack of money as the main reason in their decisions:
"But Republic of Ireland international Kevin O'Connor has agreed a new three-year deal, while Matt Somner and Jay Smith are signing two-year contracts. It is a tribute to our youth policy that we've developed players of this calibre who are now the lifeblood of the club".
Meanwhile, the club hope impressive defender, Ibrahima Sonko, will extend his contract by a further year after the club informed the Senegal U21 player that they would be taking up the one year option on his current deal.