I find it absolutely ridiculous that anyone would make a character based directly off of a "canon character" to begin with. All these Nalas and Simbas make me laugh, because it's obvious who the people with no creativity are. And then they go and have the downright nerve to claim that someone stole their character or design or name.
As for names, I also find it ridiculous, especially when that name is a common, everyday word (Rose, Berry, Feather, etc) a Warriors name (especially ones like Firestar, etc), anything Japanese, or a real name (Paul, Jason, etc) and someone claims that you are stealing their name. However, if their name was completely made up and didn't resemble another name or word at all, I think it would be justified to get a bit suspicious or even upset. I mean, if I saw another wolf running around with the name "Daedzurr" or "Cypherene" I know I would immediately be suspicious of them stealing my name because both are completely made up (smacked the keyboard and took letters I thought looked good together) and both quite long. It would be a very slim chance anyone would come up with them on their own. However, if someone had something like one of my shorter names "Haent" or "Gnar", I would probably just assume that we both did the same thing and ended up with the same result because those names are shorter.