What diaper

Last night my granddaughter informed me that she was pregnant.

I have a question about diaper recommendations. When her father was born he was allergic to all the recommended brands like pampers luvs and Huggies. He would break into a terrible rash with the first one. I think it was Walmart brand that I had to get.

I’m kinda of worried that her baby may be the same way so I’m looking for suggestions. Walmart does have a trial box that has a couple from different brands and am going to order that

TIA