[Jelle Pothoven]

I’m afraid that’s not possible.

What you can do is add an expression to the Source Text of the text in the Key comp that reads out the comp name. Then duplicate the Key comp and rename the comps to (for instance) “Key_a”, “Key_b” and so on. I’ve written a short script for you that automates this task: 7633_temp.jsx.zip

Good luck!

Expression for Source Text of text in Key comp:
thisComp.name.split("_")[1];