'Apart' in the Bible

The land will mourn, every family by itself; the [royal] family of the house of David by itself and their wives by themselves; the family of the house of Nathan [David’s son] by itself and their wives by themselves;

the [priestly] family of the house of Levi by itself and their wives by themselves; the family of Shimei [grandson of Levi] by itself and their wives by themselves;