Appending folder name with name of file inside it

so...I need help writing a script (or any other way) to rename some folders using the name of the first file inside it.

My folders look like this:

Name1
Name2
Name3
etc.
and the files inside like this:
Name1_1[8x8].jpg
Name1_2[8x9].jpg
Name1_3[9x8].jpg
etc

Name2_1[90x90].jpg
Name2_2[81x82].jpg
etc

Name3_1[700x800].jpg
Name3_2[815x800].jpg
etc

In the end, the folders should look like:

Name1[8x8]
Name2[90x90]
Name3[700x800]
etc

I've tried saving all the filenames to an array, initiated pre-batch, but that doesn't save it for later use in another script. I've tried saving all the filenames to a text file, but I can't call on it later using js. Maybe I'm going about this the wrong way, I'm not an experienced coder, never really used js in my life before getting this program...so probably there is a way I'm not thinking of.

If you know anything about this, please help. Thank you!!

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Reply to #1:

ARen has the ability to import lists in the form of delimited text files. Maybe you can create the same using a spreadsheet and then import it into ARen and rename your folders that way.

More info here:
https://www.advancedrenamer.com/user_guide/impor t

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