Which one is gramatically correct?

Question

Ordering a custom gift for my friend who is getting married. Her fiancés last name is Knowles & the character limit doesn’t support “The Knowles Family”. 
I can’t remember which one is grammatically correct 😅

Answer

Since the statement isn’t possessing anything, wouldn’t it just be “The Knowles”? Or alternatively “Knowles Family”. I don’t see a reason for putting in an apostrophe.

Answer

I wouldn’t add the apostrophe at all for a welcome mat

Answer

it's knowles' as it's plural.

Answer

I agree with the no apostrophe comment. Unless you're wanting to let everyone know that they own the welcome mat, I would simply put Knowles. It's what I would do if I were buying one for myself. Put Garrett...not Garretts (plural) or Garrett's (possessive).

Answer

If it’s a welcome mat I would just do the Knowles. Super cute and sweet idea!

Which one is gramatically correct?

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