There isn't a single person who can be credited with "calling" clouds clouds. The word "cloud" for the fluffy formations in the sky has been around for a long time, evolving from Old English and other Germanic languages.

Here's a breakdown:

* Old English: The word "clud" meant "rock" or "cliff," reflecting the appearance of dense, dark clouds.

* Other Germanic languages: Similar words existed, like "kluft" in Old Norse, also meaning "rock" or "cliff."

* Evolution of meaning: Over time, the meaning shifted to include the fluffy, white formations we call clouds today.

So, instead of a single person, the word "cloud" arose from the collective usage and evolution of language over centuries.