Sforno on Genesis 48:9/ספורנו על בראשית מ״ח:ט׳

1בני הם אשר נתן לי אלוקים בזה. My sons, but not my grandsons. These are the sons G’d granted me while I was here, alone, without any member of my family. as you said when you spoke about “those whom you had before I came to Egypt.” They are the ones of whom you said: “לי הם,” “they are mine.”