Halakhah su Isaia 40:15

Elul is written 'full,' meaning that the vav is added because this is how it appears in the Book of Nechemia chapter 6 and in the Mishnah at the beginning of tractate Rosh Hashanah. In the ninth chapter of Bechorot Tishre is written with one yud at the end of it and not more, and it is also written so in the Mishnah there. Marcheshvan is written with one vav as it is found in the Mishnah, and in the first chapter of the gemara Ta'anit as well as elsewhere. If one writes is simply as Cheshvan this is legitimate because that is what people call the month and that is how it is printed in calendars and people will not be led astray. It appears to me that if Cheshvan is written with two vavs it is also a legitimate spelling because the extra letter does not change the pronunciation and will not lead people astray. One must write Marcheshvan as a single word and if it is written as two words - Mar Cheshvan - I am in doubt that it is legitimate. Even if one says that this is acceptable, I am still in doubt in a case when Mar is written at the end of one line and Cheshvan at the beginning of the next. It appears to me that Mar is its own word meaning, as some people explain, that the rains fall in this month and Mar refers to raindrops as it is written "The nations are but a drop in a bucket..." (Isaiah 40:15) One could also say that in the Jerusalem Talmud (chapter 1, halacha 2) and in midrash Bereshit 48 it teaches that the names of the months were brought by the returnees from the Babylonian exile. Therefore one could say that they made this month a remembrance for the beginning of the sins which led to exile that itself began with the ten northern tribes and only afterward continued withe Judah and Benjamin. The 'chief sinner' was Yerovam ben Nevat who switched the seventh and eight months of the calendar, as it says in the Book of Kings (I Kings 12:32-33). Mar in Aramaic means 'switch,' which would make Marcheshvan a reference to switching Cheshvan and Tishre, the seventh and eight months. There is also a hint here thaht this change cause bitterness (marirut) to all of Israel. Despite all this, in truth we do not expound the meaning of the names of the month in a definitive fashion and therefore if Marcheshvan is written as two words or on two line this is a doubtful case despite the fact that I am inclined to permit it. If, Gd forbid, this doubt should lead to the inability to grant a divorce then perhaps one should be lenient.