Sforno on Genesis 50:7/ספורנו על בראשית נ׳:ז׳

1ויעלו אתו, voluntarily, not because Joseph had so commanded.

2זקני ביתו וכל זקני ארץ מצרים, seeing that Yaakov had been considered one of the wise men even in the eyes of the Egyptian intellectual elite. (compare Psalms 105,22 וזקניו יחכם”and to teach his elders wisdom.”)