וְאֵ֛ת שֵׁ֥ם הַשֵּׁנִ֖י קָרָ֣א אֶפְרָ֑יִם כִּֽי־הִפְרַ֥נִי אֱלֹהִ֖ים בְּאֶ֥רֶץ עָנְיִֽי׃
Ao segundo chamou Efraim; porque disse: Deus me fez crescer na terra da minha aflição.
Targum Jonathan on Genesis
And the name of the second he called Ephraim; for he said, The Lord hath made me mighty in the land of my affliction, as he will make the house of my father mighty here in their afflictions.