Or HaChaim on Genesis 33:17/אור החיים על בראשית ל״ג:י״ז

1 נסע סכותה, He journeyed towards Sukkot. The reason this place was called סוכות was because there Jacob built pens and shelters for his herds and cattle. The Torah purposely does not say לסוכות, "to Sukkot" because this would have led us to believe that this place had already been known by the name סוכות. You may well ask why the Torah bothered to mention the fact that Jacob called the name of the place where he built shelters for his animals סוכות. Perhaps the reason is that Jacob was the first human being who expended so much time, energy, and money in order to assure his animals a degree of comfort both in summer and in winter.