Or HaChaim on Exodus 31:2/אור החיים על שמות ל״א:ב׳

1ראה קראתי בשם בצלאל, "See, I have called by name Betzalel, etc." Perhaps the extra word בשם is intended to draw our attention not only to Betzalel's name but also to that of his father and grandfather and how those names reflected Betzalel's impact on his contemporaries. The name בצל־אל suggests that he was the man through whom a shelter was provided for G'd on earth. בן אורי suggests that Betzalel's father looked upon G'd as the source of his inspiration and enlightenment. בן חור is a reference to freedom, בן חורים. Betzalel helped free the Israelites from the remaining stigma of the golden calf by helping Israel to regain its good graces. Our sages in Shemot Rabbah 51,4 in connection with the words משכן העדות in Exodus 38,21 point out that the reason for that designation of the Tabernacle was that its existence was testimony, עדות, that G'd had forgiven the Jewish people for the sin of the golden calf. This very thought was also anchored in Betzalel's name and the name of his forebears. The allusions we just referred to would justify the conjunctive letter ו in front of the words ו־אמלא אותו רוח אלוקים בחכמה,"and I will fill him with a spirit of wisdom." This may also be the reason that the Torah speaks of בחכמה, instead of simply חכמה when describing G'd's input as additional to Betzalel's natural talents and virtues. Alternatively, the word בחכמה may reflect a statement of our sages in Berachot 55 based on Daniel 2,21 that G'd adds additional wisdom to people aleady possessed of a measure of wisdom. Accordingly, the words ואמלא…בחכמה, mean: "and I will add wisdom to Betzalel who already possesses wisdom."