Do agree on that nice Merry-Rohan link, Mnemo but I don't think the names are particularyl significant. People often do change a horses name when they buy it - Sam names Bill for example. I thin we are more anthropomorphic these days - I read this week that there has been a change in the names people give dogs so that they are now mostly human names. They may have regarded naming horses as sentimental as naming a car (though most of my cars have had names
). Only in Rohan where the horses were as loved practically as their children is the name more important seemingly.