our (pron.)youdaoicibaDictYouDict[our 词源字典]
Old English ure "of us," genitive plural of the first person pronoun, from Proto-Germanic *ons (cognates: Old Saxon usa, Old Frisian use, Old High German unsar, German unser, Gothic unsar "our"), from PIE *nes-, oblique case of personal pronoun in first person plural (source of Latin nos "we," noster "our"). Also compare ours. Ourselves (late 15c.), modeled on yourselves, replaced original construction we selfe, us selfum, etc.[our etymology, our origin, 英语词源]
rendezvous (n.)youdaoicibaDictYouDict
1590s, "place for assembling of troops," from Middle French rendez-vous, noun use of rendez vous "present yourselves," from rendez, plural imperative of rendre "to present" (see render (v.)) + vous "you," from Latin vos, from PIE *wos- "you" (plural). General sense of "appointed place of meeting" is attested from 1590s.
yourselfyoudaoicibaDictYouDict
by early 14c., from your + self. Plural yourselves first recorded 1520s.