Would you expect an animal with the name Rania onca to look similar to a mountain lion? Why or why not?

No, This is because they don't posses the same genus name

Explanation:

Classification of organisms refers to grouping of living things systematically by the scientist with the consideration of their characteristics, hierarchy and phylogenetic relationships that exist in them.

genus is a taxonomic ranking which is rank that exist between the eight taxonomic rank. is make used by biologist for biological classification of organisms, the classification is usually above species but below family ranking. Genus has one or more species under it, while a family classification contain genus.

It target the Species that display similar characteristics consist a genus. There is very high number of genus name accross the world today. Considering binomial nomenclature, scientific name comprise of genus name with a specific epithet, the genus name is capitalized and it come first while the specific epithet is italicized.