G3609–οἰκεῖος–oikeios

As we have therefore opportunity, let us do good to all men, especially to them who are of the household of faith.

οἰκείους oikeious “of the household”

Now therefore ye are no more strangers and foreigners, but fellow-citizens with the saints, and of the household of God;

οἰκεῖοι oikeioi “of the household”

But if any provideth not for his own, and especially for those of his own house, he hath denied the faith, and is worse than an infidel.

οἰκείων oikeiōn “[their] household”