תּוֹרָ֥ה צִוָּה־לָ֖נוּ מֹשֶׁ֑ה מוֹרָשָׁ֖ה קְהִלַּ֥ת יַעֲקֹֽב׃
Isang Torah ang iniutos sa amin ni Moises, isang pamana ng kapulungan ni Jacob.
Metzudat Zion
Kohelet. This refers to the concept of gathering and collecting, like the congregation of Jacob (Deuteronomy 33:4), and King Solomon was referred to [as Kohelet], because he gathered the conflicting opinions to merge and clarify the correct from the incorrect:
Rashi
Koheles. [He was called Koheles] because he gathered [=קִהֵל much wisdom,11The term קהלת meaning gathering is in Devarim 33:4 where it states, “the gathering [קהלת] of Yaakov.” (Metsudas Tzion) and similarly, elsewhere [Scripture] calls him, “Agur Bin Yokeh,”12Mishlei 30:1. This is a reference to Shlomo, meaning the gatherer [אגור] of wisdom [בן] spewed out [יקה] the prophecy [המשא]. because he gathered אָגַר all the wisdom and spewed וַהֲקִיאָהּ it out, and some say that he would say all his words in public assembly [=בְּהַקְהֵל.13Alternatively, he gathered together and clarified many conflicting views. (Metsudas Tzion)