Like Tannen, Oren is a very subtle winter or Christmas name. From Hebrew, Oren means "pine tree," and it is the word for orange in Welsh. Oren is also very close to the names Orin and Oran (Odhran) - Gaelic, meaning "pale green." Spelled Orrin it is both a place name and a Scottish name meaning "pale-skinned," but also in Scottish the spelling Oran means "song." Ören is a Turkish word meaning "ruins" and is used as a surname and place name. Oren has been used in the Old Testament and on several modern, not very well known namesakes, both as a first and last name. The Hebrew version is regularly used in Israel.
In 2013 there were 108 boys given the name Oren in the U.S., and it hasn't been used so much since the 1920's but it has been used steadily since 1880. Orin was given a bit less in 2013 with only 64 boys, while Orrin was an equally popular spelling with 62 boys. Oran was only given to 20 boys the same year.
Being so rare, yet sounding so familiar, Oren no matter how you choose to spell it would make an excellent name today.