"pretender to the Aztec throne"
Montezuma II
Public DomainLast of the Aztecs - Credit: N Matthew

When the Aztec Empire was overthrown by the Spanish in 1521 its leader Moctezuma (Montezuma) II had eight daughters and eleven sons, leaving plenty of scope for heirs; although estimates put the Aztec population at 19 million before the Spanish conquest, and less than 2 million after.