How do I import two different label names into the "Formal Name for Envelope" field?

To import a list with two label names in the "Formal Name for Envelope" field you can have the first name in a column with the header "label name" and the second in a column with the header "label name 2" in the Excel file.

When importing from a text file, list all the label names first, then the address. Sample Excel and Word templates are attached to this article.