בעל צפון

 I was at a shiur this week where the name of this עבודה זרה was mispronounced as Ba'al Tzafon (with a קמץ under the צ). The מגיד שיעור corrected himself immediately but it got me thinking - what is the actual meaning of this name? If it is just the idol of the north, it should in fact be Tzafon. There is plenty of discussion in the commentaries about the fact that this was an עבודה זרה, but not so much the actual etymology of the name.

Someone in one of my WhatsApp Dikduk groups pointed me to a מדרש שכל טוב which explains that it is in fact a reference to the north but seems to indicate that it is similar to the word צפוני, northern, which does have a natural שוא under the צ. So the ending יו"ד is dropped but the שוא stays and that is how we have Tzefon.

While on the topic of this word, see כלי יקר דברים ב:ג regarding the connection between north, tzafon, and hidden, tzafun.