I think you just failed to pick up on the hints...
First of all, Kreia discussed Revan leaving Canderous/Mandalore when she was recruiting him...
Secondly, Mandalore's battle cry was "For clan Ordo!" - Ordi being Canderous' clan (his blaster in the first game was called "Ordo's repeating blaster" or something like that).
And finally, if you are still not convinced: check out the official KotOR II site. Look up characthers and go to 'Mandalore', and you'll see the name 'Canderous'.