"Who" = (1) chi (for people) or (2) che (as a relative pronoun) (1) who are you looking for? chi stai cercando? (2) my cousin who lives in New York mio cugino che vive a New York "Which" = (3) quale, or (4) che, cui, il (la) quale (as a relative pronoun) (3) which book do you want? quale libro vuoi? (4) the apple (which) you ate la mela che hai mangiato (4) the meeting (which) we attended la riunione a cui abbiamo partecipato (4) the chair on which la sedia sulla quale or su cui Whose = (5) di chi or (6) il (la) cui (relative pronoun) (5) whose is this? di chi è questo? (5) whose daughter are you? di chi sei figlia? (6) the girl whose sister you were speaking to la ragazza alla cui sorella stavi parlando (6) the man whose son you rescued l'uomo di cui hai salvato il figlio

Who is at the door ? Who won the football match ? Who = People Which of the paintings do you prefer ? Which = When you are specifying amidst a group of things Whose bike is this ? Whose father works at the bank ? Whose = Used when questioning a person about someone or something related to them.