Keluaran 28:10

28:10 six ¹  of their names on one stone, and the six remaining names on the second stone, according to the order of their birth. ² 

Keluaran 38:3

38:3 He made all the utensils of the altar – the pots, the shovels, the tossing bowls, the meat hooks, and the fire pans – he made all its utensils of bronze.

[28:10]  ¹ tn This is in apposition to the direct object of the verb “engrave.” It further defines how the names were to be engraved – six on one and the other six on the other.

[28:10]  ² tn Heb “according to their begettings” (the major word in the book of Genesis). What is meant is that the names would be listed in the order of their ages.