Charles Ellicott Commentary Genesis 41:51

"And Joseph called the name of the first-born Manasseh: For, [said he], God hath made me forget all my toil, and all my father`s house." — Genesis 41:51 (ASV)

Manasseh. —That is, causing to forget. Joseph has been blamed for forgetting “his father’s house,” but the phrase means that now that he was married and had a child, he ceased to suffer from homesickness, and became contented with his lot. He pined no longer for the open downs of Canaan as he had done in the prison; but his love for his father was as warm as ever.