I'm not entirely sure what the question here is, but the rhino and the horse are in the same order, Perissodactyla, but not in the same family. And yes, that is one theory on the myth of the unicorn.
Rhinos and ibexs are thought to have been the inspiration for unicorns.
No they are not in the same family as horses and whether they inspired the myth of the unicorn is a matter of opinion.
No
Rhinos are NOT in the same family as horses and they may have been the cause of many "real" unicorn sightings.
Rhinos are scientifically placed in the group of pachyderm. but people once thought of them in the same familly as horses in error. It is possible they inspired the unicorn myth but it is unlikely, since they look so different.
No
Horses, yes.
No. They're in the same kingdom Animalia, phylum Chordata, class Mammalia, and order Perissodactyla. But horses are in the Equidae family, and rhinoceros in the Rhinocerotidae.
The closest relatives to the rhinos are the Tapirs and the horses. I have no idea why thou!!
"Unicorns" always were rhinos. "Unicorns" in the sense of mythical horned horses have never existed."Unicorns" were actually single-horned rhinos (the Indian Rhinoceros), which were used as beasts of war in ancient times. They were misinterpreted as a mythical creature.See this related question: Do Unicorns Exist?
No, it is a species of male unicorn. Sadly, it only exists in our imaginations.
Rhinocerotidae.
there family
a herd
Rhinos belong to the family Rhinocerotidae, within the order Perissodactyla, which includes other hoofed mammals like horses and tapirs. There are five species of rhinos: white rhinoceros, black rhinoceros, Indian rhinoceros, Javan rhinoceros, and Sumatran rhinoceros.