וַיְהִ֣י ׀ בַּחֹ֣דֶשׁ הַשְּׁבִיעִ֗י בָּ֣א יִשְׁמָעֵ֣אל בֶּן־נְתַנְיָ֣ה בֶן־אֱלִישָׁמָ֣ע מִזֶּ֣רַע הַ֠מְּלוּכָה וְרַבֵּ֨י הַמֶּ֜לֶךְ וַעֲשָׂרָ֨ה אֲנָשִׁ֥ים אִתּ֛וֹ אֶל־גְּדַלְיָ֥הוּ בֶן־אֲחִיקָ֖ם הַמִּצְפָּ֑תָה וַיֹּ֨אכְלוּ שָׁ֥ם לֶ֛חֶם יַחְדָּ֖ו בַּמִּצְפָּֽה׃
И было так, что в седьмом месяце Измаил, сын Нафании, сын Елисамы, из рода царского, и один из начальников царя и десять человек с ним, пришел к Гедалии, сыну Ахикама Мицпе; и там они ели хлеб в Мицпе.
Ibn Ezra
My master among the nations - it is not used as in the first example, but only in formal language, such as "VeRabi HaMelech" (Jeremiah 41:1), "Al Kol Rav Beitoh" (Esther 1:8). And the letter "Mem" is opened with the letter "Lamed" to indicate the missing "Aleph" of understanding. The letter "Mem" is not emphasized to lighten the language.
Rashi
A sword, a sword Two swords: the sword of the king of Babylon first, and afterwards the sword of the children of Ammon in the hand of Ishmael the son of Nethaniah, who will slay Gedaliah and those gathered to him of the survivors of the sword, as is delineated in Jeremiah (41:1-10).
Rashi
the fast of the seventh [month] The third of Tishri, when Gedaliah was assassinated.
Rashi
she was the mother of Onam (I heard) that “mother” is like (Judg. 5:7): “I arose as a mother in Israel.” And she was the mother of Onam, and Onam is an expression meaning that he was humble and weak, an expression of mourning (אוֹנֵן), and like (Deut. 26:14): “I have not eaten of it in my mourning (בְאֹנִי),” and like (Num. 11:1): “... were as if in mourning over themselves (כְּמִתְאוֹנְנִים)” Sheshan, who gave his daughter to his Egyptian slave, Jarha, was descended from him, and [the Chronicler] tells of their disgrace; that is to say, they were not deserving of the kingship, and Ishmael the son of Nethaniah, the son of Elishama, who assassinated Gedaliah the son of Ahikam, was descended from him (Jer. 41:1).
Rashi
And Sheshan gave his daughter to Jarha his slave for a wife From here they derived that if your daughter has matured, free your slave and give him to her (Pes. 113a), and from here the Sages derived in the Palestinian Talmud, Tractate Yebamoth (source unknown): “Do not trust a proselyte until fifteen generations, and fifteen generations are from Ittai the Egyptian until Ishmael, and some say sixteen generations, including Jarha.” The midrash states the following: “Is it possible that he was of the royal descent (מִזֶּרַע הַמְלוּכָה) [as in Jeremiah 41:1]? Now was not Ishmael of the seed of Jerahmeel and not from Ram? But rather it means that he passed his seed to the molech.”