Why is the ninth month called September?
c.1400, "ancestry, race," from Old French origine "origin, race," and directly from Latin originem (nominative origo) "a rise, commencement, beginning, source; descent, lineage, birth," from stem of oriri "to rise, become visible, appear" (see orchestra).
origin or·i·gin (ôr'ə-jĭn)
The point at which something comes into existence or from which it derives or is derived.
The fact of originating; rise or derivation.
The point of attachment of a muscle that remains relatively fixed during contraction.
The starting point of a cranial or spinal nerve.