Get multiple file names and feed them into variable

I have an automator app partly containing a "Run AppleScript" section where I want to feed filenames from the input into a variable that I later use as a title for in an email generated by the workflow in the app with "New Mail Message".

Here's the apple script code:

on run {input, parameters}
	
	tell application "Finder"
		set Filenames to name of file input
	end tell
end run

When i input one file everything runs smoothly, but if i input two or more i get this error message "Can't make ___ into type integer" :

I'm on 10.15.7 Catalina with a 16" MBP (2019)