Need help relating a list of random numbers to a list of names so that i can create a rota

Sorry, I'm a bit of a novice in these matters and have been having some trouble. I'm trying to create a staff rota which will populate a rota randomly when prompted - I have been trying to find some way of connecting the random lists and the staff names, though this has proved difficult (to say the least!). Can anybody give me any advice about how best to proceed? I'm also fully aware of the possibility that my present design will also double book people (place then on reception and telephone duty simultaneously). I would appreciate any advice!