οἰκεῖος

of one's family, domestic

Definition

The adjective οἰκεῖος primarily means 'belonging to the household' or 'of one's own family.' It denotes a close, intimate relationship based on shared domestic life or kinship. In the New Testament, it carries this core sense but is applied spiritually: in Ephesians 2:19, believers are no longer strangers but 'fellow citizens with the saints and members of the household (οἰκεῖοι) of God.' In Galatians 6:10, the 'household of faith' (οἰκείους τῆς πίστεως) refers specifically to the Christian community. A more literal, biological family sense is seen in 1 Timothy 5:8, where providing for 'one's own household' (τοὺς ἰδίους οἰκείους) is a basic duty.

Biblical Usage

This word is used only three times in the New Testament, always by Paul. It consistently describes a sphere of belonging and responsibility. In Ephesians 2:19 and Galatians 6:10, it is used metaphorically for the church as God's spiritual family. In 1 Timothy 5:8, it refers to one's immediate biological family. The pattern shows Paul using the same term to bridge the concepts of natural family obligation and the new, primary kinship found in the Christian community.

Etymology

Derived from the noun οἶκος (oikos, G3624), meaning 'house,' 'household,' or 'dwelling.' The adjective οἰκεῖος literally means 'pertaining to the house' or 'domestic.' It shares this root with words like οἰκέτης (oiketēs, G3610), 'household servant,' and οἰκονομία (oikonomia, G3622), 'household management' or 'stewardship.' Its meaning developed from the concrete physical household to include those who belong to it, emphasizing relationship and intimacy.

Semantic Range

Οἰκεῖος is theologically significant because it defines the nature of the church. It moves believers from being outsiders ('strangers and aliens,' Ephesians 2:19) to being insiders—God's own family. This redefines identity, obligation, and privilege. Understanding this Greek term enriches reading by highlighting that Christian ethics (Galatians 6:10, 1 Timothy 5:8) flow from this new familial status; care for the 'household of faith' is an extension of care for one's own family, both grounded in our shared identity as God's οἰκεῖοι.

In the ancient Greco-Roman world, the οἶκος (household) was the fundamental social and economic unit, including not just blood relatives but also slaves, servants, and sometimes close associates. Being 'οἰκεῖος' meant you were under the authority and protection of the household head (paterfamilias) and shared in its life and resources. This context makes Paul's metaphor powerful: entering God's household means coming under His authority and sharing fully in the inheritance and responsibilities of His family.

συγγενής (syngenēs, G4773) — emphasizes blood kinship or common descent. οἰκεῖος focuses more on shared household life, which can include non-blood relations. ἀδελφός (adelphos, G80) — means 'brother,' a specific familial relationship within the οἶκος. οἰκεῖος is broader, describing the quality of belonging to the household itself.

Word Details

Scripture References