Im using a text parser to match a pattern in a string so I can return that match later on in my scenario

The expected value is a name, but it can be 10.000 different options of names, they all have an alias which is the value that I want it to replace, the aliases are stored in a database... Since nesting 10.000 replace functions is not an option I think. Can I use a lookup table kind of functionality for this or does anybody have an idea how to approach this wanted result?