Do cats know what these things are

I find this very instresting because a lot of people assume that anything found in nature must be known the the clans but thats honestly not true. A common name I use is 'Celandinepaw' which is a kind of flower actually mentioned in the books and is a reference to her character traits. (A lot of research went into this) When I first used it someone was using a name (I can't quiet recall) that didn't suit the their character or had any connection to the clan or territory and it bothered me a lot. I feel like if the clan has the object/species in the territory or mentioned somewhere in the books it's safer to use, though if it's not found in the clan the cat is in then it shouldn't be their name. Some people don't acknowledge this and I understand your thoughts.
(Just an opinion btw I understand in different thoughts)