Relational Tables

I do like this system. It's very to access through the internet. One question I do have: Can you relate tables? Is there a Relational Database Management System? I am concerned about people typing in the wrong names under each column and I need to relate the two names together not with just the name, but possible numbers with each other. Example might be a company name such as House & Home which has about 3 different ways of naming it such as House And Home, House and Home, House & Home.
ktodaei