oikiakos refers to people belonging to a household, including those portrayed as a man's enemies.

The two occurrences depict people belonging to a household: in one, they are those connected with the master of the house; in the other, they are a man's own household members who become his enemies.

1. People belonging to a household · dominant

   In Matthew 10:25, the accusative plural occurs in the comparison between the master of the house and those connected with him; the APB renders the clause “how much more will they malign the members of his household.” In Matthew 10:36, the nominative plural identifies a man's enemies as those of his own household; the APB renders “the members of his own household.”

   Matthew 10:25Matthew 10:36

In the Anselm Project Bible: Across Matthew 10:25 and Matthew 10:36, the APB presents the household connection with “members of his household” and “members of his own household.” These phrases confirm the verse-level portrayal rather than isolate a precise English equivalent.