Centauri Families

Where would i find stuff on them has there been a book released to cover the Centauri? Please bear in mind i have only just purchased the RPG i find mention that there are centauir clans/families just no names of them ! :D
There is some information within the Centauri Republic Factbook which covers the major noble houses, their motivations, alliances and connections. Don't think there is anything on the minor ones if you are looking for those but would suggest looking at the above mentioned factbook if you plan on touching the Centauri. A good read.