I. (ˈ)hü|zevə(r) adjective
Etymology: whose (II) + ever
: of, belonging to, or relating to whomever
whosever hat this is, I wish he would come and claim it
II. pronoun
: whosever one or whosever ones — used without a following noun as a pronoun equivalent in meaning to the adjective whosever
whosever these gloves are, I wish he would come and claim them