Funnily enough I’ve really only heard it referred to as “Maslow’s hierarchy” and not a pyramid specifically until this thread. Which appears to be proper accreditation.
In Norway I have often heard it referred to as “Maslows behovspyramide”, which translates to “Maslow's Pyramid of Needs.”
Indeed, even one of the greatest encyclopaedias in Norway mentions “Maslows behovspyramide” in their article about Maslow. https://snl.no/Abraham_Maslow (article is in Norwegian.)