Looping within a cell?

[RaviWildcat]

Hello everyone - I've got a cell with several words in it and I want to capitalize only the names:

So, if I have a list with 3 names

Greg
Peter
Bobby

and my value in cell A1 is

greg -play the guitar for peter and bobby

I can probably do something like

=SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(A1,"greg","Greg"),"peter","Peter"),"bobby","Bobby")

This will work if I have 3 names but could get cumbersome if I have hundreds of names to check.

Is there a way to specify how many times to loop in a cell?

(I could also do an index match table to store all the names, but I'd still need to first check for name 1, then name 2 then name 3 etc)

I can also write a macro to put every word into an index table and then compare that table against a match table etc. but I wonder if it's possible to solve using a formula?

Ravi