IML are the functions used to insert/process data on modules
everything in this box each tab.
Example simple name splitter.
First Module sets an example name.
2nd module splits the name into an array of individual words.
then grabs the first in array as the first name
and the last in the array as last name,
This is the final result
Note, this is the simple version. you may have to account for “jr” after the last name, or middle initials. i do not off the top of my head know how stripe sends that data. Regular expressions or more complex IML should be able to handle more variance.
there are also cultural name formatting differences if you have to account for internationalization.
Hope this helps 
Go with this answer it has better coverage of name variation
Thank you @alex.newpath !