Almost all "variety names" of tropical fruits are chosen, totally informally, by plant explorers, nursery personnel, experiment station personnel, and backyard hobbyists.
In most cases these plants and the current-names-in-the-trade used for them have never made it into any formal registry or any other form of legal definition or protection. We are still rather much a part of the wild world, and most of the plants we use are entirely subject to the topsy-turvy irregularities of human popular cultures.
I have named, at the moment of collection of graftwood from seedlings that appeared to be above average or to have some distinct characteristic, quite a few varieties. These names then served as the identifiers for propagation, verbal descriptions, and sales.
I also am the plant breeder who coined the above common-name terms for hybrids, following the model of "atemoya", which was coined over a hundred years ago.
Several countries and international organizations have set up formal procedures for variety registrations which apparently have been useful for Green Revolution multiple-generation-hybridization-for-production-of-grain-seeds for rice, wheat, corn, and soybeans. Most of this is not practical / cost effective for varieties that are to be produced vegetatively, such as by grafting. The imposition of considerable bureaucratic procedures and fees onto tropical fruit tree species that have not undergone centuries of experiment station efforts, is mainly attractive to those who have a vested interest---salaries--- in receiving a mandate to "regulate an industry."