johannes
noun
jo·han·nes
variants or less commonly joannes
jōˈ(h)anə̇s
plural johannes also joannes
: an old Portuguese gold coin first issued in the 18th century and equivalent to 6400 reis
called also half joe
compare dobra
Word History
Etymology
after Johannes or Joannes John (or João) V †1750 king of Portugal who first issued such coins and whose name appeared on them