Entonces, the personal pronouns in Spanish are as follows: I (yo), you (tu, vos or usted), he (el), she (ella), we (nosotros), you (ustedes or vosotros), they (ellos). The vos/vosotros form is only used in Spain and a couple of South American countries (I forget which).
Y'all was the word I was thinking of but couldn't quite pull it out.