Save Type Country Usage Spanish, Portuguese Pronounced Pron. /ˌrei.no.u.ˈni.ðo/(Spanish) [key·simplify] Meaning & HistoryExpand Links Spanish and Portuguese calque of United Kingdom, written with the definite article (el and o respectively). Related NamesFamily Tree·Details Rootsregnum + unitusOther Languages & CulturesRoyaume-Uni(French) Regno Unito(Italian)