Arcana Coelestia # 6283
6283. 'And in them will my name be called' means that in them the essential nature of the good of spiritual truth from the natural will be present. This is clear from the meaning of 'one's name being called in another' as the essential nature of one in the other, dealt with in 1754, 1896, 2009, 3421; and from the representation of 'Israel' as the good of spiritual truth from the natural, dealt with above in 6277. And since they had within them Israel's essential nature they were accepted among the rest of Jacob's sons and became tribes, one the tribe of Manasseh, the other the tribe of Ephraim. Along with the rest - though excluding the tribe of Levi because it became the priesthood - they made up the twelve tribes when inheritances were allotted to them, as described in Joshua and also Ezekiel 48.
Measure and Measuring Rod
In Revelation 21:15, this signifies to estimate the nature of reality, and so to understand and know that the Lord gives people in the good of love the ability to know the character of His New Church as to doctrine and its introductory truths and as to the Word from which these are drawn. (Apocalypse Revealed 313, 315, 904)