Banoii
I have found a site, that lists William and Andrew both as convicts, with details as you stated, i do apoligise for the info about 'claim a convict' but you didnt seem to mnd,

William Kennedy
Details
Alias: Irish Rebel: Religion: Catholic Age on arrival: 52
Marital status: Single
Calling/trade: Stockman butcher
Born: 1777 Native place: Tipperary
Tried: 1829 Tipperary Sentence: 7 Former convictions:
Ship: Larkins (2) [1829]
Crime: Stealing sheep
Description:
Remarks:
Spouse:
Died:
Is on this site, Andrew is also listed, may be worth contacting them, they may have some info
http://members.tip.net.au/~ppmay/cgi-bin/irish/irish.cgiDaizi