This is a quick amatuerism attempt.
SELECT tblStudentsNames.FirstName, tblStudentsNames.LastNameSurname
FROM tblStudentsNames
GROUP BY tblStudentsNames.FirstName, tblStudentsNames.LastNameSurname
HAVING ((Not (tblStudentsNames.FirstName)=[enter firstname]) AND ((tblStudentsNames.LastNameSurname)=[enter surname]))
HTH
David