Corojo was a Cuban wrapper seed, linked in the public record to the El Corojo farm in Pinar del Río. After the revolution and the embargo, growers took corojo seed out of Cuba, and it began to be grown in Honduras, Nicaragua, and elsewhere, sometimes crossed with other varieties and sometimes kept as a separate named type.
On a modern band, corojo usually means this seed variety used as wrapper (or sometimes as binder or filler). It is often sun-grown and reddish in color. It does not prove the tobacco is Cuban; Cuban-seed tobacco is not the same as tobacco grown in Cuba. See cuban seed.
Treat a company’s claims as that company’s description. If a manufacturer says corojo, that is the seed it is naming. This page does not name any single farm as the source of “true” corojo today.