In Genesis 48:6 (NASB)
But your children that you have fathered after them shall be yours; they shall be called by the names of their brothers in their inheritance.
Did Joseph have other children apart from Ephraim and Manasseh?
There are two matters raised here in Gen 48:6 -
A. Jacob adopting Joseph's sons
The Jamieson-Fausset-Brown Bible Commentary answers this quite succinctly:
- thy two sons, Ephraim and Manasseh—It was the intention of the aged patriarch to adopt Joseph's sons as his own, thus giving him a double portion. The reasons for this procedure are stated (1Ch 5:1, 2).
are mine—Though their connections might have attached them to Egypt and opened to them brilliant prospects in the land of their nativity, they willingly accepted the adoption (Heb 11:25).
See appendix below about the double portion
B. Joseph's further children??
Benson answers this quite well -
Genesis 48:6. Thy issue after them — The Scriptures nowhere mention, nor does it appear that Joseph had any more children than these. But Jacob speaks this on supposition that he might, and in case he should have any more. Shall be thine — Shall be reputed as thy children and my grand- children, and shall not have any distinct share of my present and future inheritance, but shall have a part of their brethren’s lot in such manner and proportion as thou shalt think fit.
APPENDIX - Double portion
The birthright had several provisions that would normally have been inherited by Reuben; however, Reuben disqualified himself by his incestuous actions from the birthright, Gen 49:4. Therefore the birthright provision were distributed among the other tribes as follows: