GOD'S WORD® Translation
This is true because he already knew his people and had already appointed them to have the same form as the image of his Son. Therefore, his Son is the firstborn among many children.

American Standard Version
For whom he foreknew, he also foreordained to be conformed to the image of his Son, that he might be the firstborn among many brethren:

Berean Study Bible
For those God foreknew, He also predestined to be conformed to the image of His Son, so that He would be the firstborn among many brothers.

Douay-Rheims Bible
For whom he foreknew, he also predestinated to be made conformable to the image of his Son; that he might be the firstborn amongst many brethren.

English Revised Version
For whom he foreknew, he also foreordained to be conformed to the image of his Son, that he might be the firstborn among many brethren:

King James Bible
For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren.

World English Bible
For whom he foreknew, he also predestined to be conformed to the image of his Son, that he might be the firstborn among many brothers.

Young's Literal Translation
because whom He did foreknow, He also did fore-appoint, conformed to the image of His Son, that he might be first-born among many brethren;

Romans 8:29 Additional Translations ...