מֵרוֹם Merom
Every verse in which this name stands — 2 places, in canonical order, first appearance to last. These are the occurrences our own corpus tags as this name, counting every form the text writes it in, which is the number on the list.
A lake in Palestine. The name stands twice in the Tanakh, first at Joshua 11:5 and last at Joshua 11:7.
וַיִּוָּעֲדוּ כֹּל הַמְּלָכִים הָאֵלֶּה וַיָּבֹאוּ וַיַּחֲנוּ יַחְדָּו אֶל־מֵי מֵרוֹם לְהִלָּחֵם עִם־יִשְׂרָאֵֽל
And all these kings met together, and they came and pitched together at the waters of Merom, to fight with Israel.
וַיָּבֹא יְהוֹשֻׁעַ וְכָל־עַם הַמִּלְחָמָה עִמּוֹ עֲלֵיהֶם עַל־מֵי מֵרוֹם פִּתְאֹם וַֽיִּפְּלוּ בָּהֶֽם
So Joshua came, and all the people of war with him, against them by the waters of Merom suddenly, and fell upon them.
Quick answers
What is the gematria of Merom?
Merom — מרום in Hebrew — has a gematria of 286 in the standard method.
How many times is Merom named in the Tanakh?
2 times, first at Joshua 11:5.
A spelling is not a name. The written word מרום stands 25 times in the corpus, which is a different question and often a different number: the same letters can spell another name or an ordinary word, and a name written with a particle attached is a word that search never returns. It is here, as itself.
Search the spelling מרום →