Latin:
* clamor: a loud outcry or noise
* clamorous: making a lot of noise
* declamation: the act of speaking in a loud, formal, and often theatrical way
English:
* claim: to demand something as one's own
* exclaim: to shout or cry out suddenly and loudly
* proclaim: to announce something publicly and formally
It's important to note that the root "clam" is not as widely used as some other roots, and the words listed above are some of the most common examples.