What is the origin of the name Ori?
Their name may have some meaning, and given that the Latin (and presumably Ancient) word for origin is origo or originis, it is possible that they are called by the name derived from their religion/belief (in their language, not only in English). In a similar fashion, the Alterans' name may be derived from Latin/Ancient word alter, which means the other, therefore the ones opposed to the Ori.
Both in-universe and out-of-universe answers are welcome. Hallowed are the Ori.