  Several auroral events that occurred in the past have not been catalogued as
such due to fact that they were described in the historical sources with
different terminology. Hayakawa et al. (2016) have reviewed historical oriental
chronicles and have proposed the terms "unusual rainbow" and "white rainbow" as
candidates to auroras. In this work, we present three events that took place in
the 18th century in two different settings (the Iberian Peninsula and Brazil)
that were originally described with similar definition/wording used by the
oriental chronicles, despite the inherent differences in terms associated to
oriental and Latin languages. We show that these terms are indeed applicable to
the three case studies from Europe and South America. Thus, the auroral
catalogues available can be extended for occidental sources with this new
terminology.
