When I was a beginning gardener, decades ago, I tried to grow all the spices of my kitchen shelf: sage, rosemary, thyme, oregano and so on. I have had oregano in my gardens ever since.
Common oregano, also called Greek oregano, pot marjoram, and wild marjoram, is Origanum vulgare in the mint family, Lamiaceae (also called Labiatae). Origanum is the Greek name for the plant, although you can read the more romantic explanation that it is a combination of óros and gános meaning "mountain splendor" or "mountain joy," perhaps both are true. The species epithet, vulgare, means "common." Oregano in native to southern Europe where it has a number of close relatives, such as sweet marjoram (Origanum majorana).