Genesis 45:3

“And Joseph said unto his brethren, I [am] Joseph, etc.] As soon as he could compose himself a little, and utter his words, the first thing he said was, that he was Joseph; that was his right name, his Hebrew name; though he was called by the Egyptians Zaphnathpaaneah, and by which name Joseph’s brethren only knew him, if they knew his name at all; and it must be very startling to them to bear this sound, and to be told by himself that that was his name; and which was not all he meant and they understood, but that he was Joseph their brother as afterwards expressed: doth my father yet live? this he knew before, for they had told him he was alive; wherefore he puts this question not through…”

“I am Joseph--or, "terrified at his presence." The emotions that now rose in his breast as well as that of his brethren--and chased each other in rapid succession--were many and violent. He was agitated by sympathy and joy; they were astonished, confounded, terrified; and betrayed their terror, by shrinking as far as they could from his presence. So "troubled" were they, that he had to repeat his announcement of himself; and what kind, affectionate terms he did use. He spoke of their having sold him--not to wound their feelings, but to convince them of his identity; and then, to reassure their minds, he traced the agency of an overruling Providence, in his exile and present honor [Gen…”

“- Joseph Made Himself Known to His Brethren 10. גשׁן gôshen, Goshen, Gesem (Arabias related perhaps to גשׁם geshem “rain, shower”), a region on the borders of Egypt and Arabia, near the gulf of Suez. The appeal of Judah is to Joseph irresistible. The repentance of his brothers, and their attachment to Benjamin, have been demonstrated in the most satisfactory manner. This is all that Joseph sought. It is evident, throughout the whole narrative, that he never aimed at exercising any supremacy over his brothers. As soon as he has obtained an affecting proof of the right disposition of his brothers, he conceals himself no longer. And the speech of Judah, in which, no doubt, his brothers…”

“45:3 The brothers were stunned at the news, unable to speak from amazement and fear (45:5; cp. 50:15).”