If you want a cloud you can actually touch, you can make one using science:
Similar to naming a star, you can pay for symbolic recognition.
Some artists have famously "caught" clouds in bags and sold them as unique art pieces for thousands of dollars. 3. "Buy" a Cloud for the Environment
While no official scientific body recognizes these names, companies like International Star Registry offer similar "ownership" experiences for celestial bodies where you receive a certificate of authenticity and a map.