3 John 1:12

Δημητρίῳ μεμαρτύρηται ὑπὸ πάντων, καὶ ὑπ᾽ αὐτῆς τῆς ἀληθείας· καὶ ἡμεῖς δὲ μαρτυροῦμεν, καὶ οἴδατε ὅτι ἡ μαρτυρία ἡμῶν ἀληθής ἐστι.

RBT Translation:

He has been witnessed to Belonging to Mother Earth ("Demetrius")³ under all, and under herself the Truth, and we also are bearing witness, and we have seen that the Testament of ourselves, she is a true one!

Julia Smith Literal 1876 Translation:
It has been testified to Demetrius by all, and by the truth itself: and we also testify; and know that our testimony is true.

LITV Translation:
Witness has been borne to Demetrius by all, and by the truth itself. And we also bear witness, and you know that our witness is true.

Footnotes

3

Δημήτριος (Dēmētrios) is derived from Δημήτηρ (Demeter), the ancient Greek goddess of agriculture and the harvest. The name Δημήτηρ is composed of δᾶ (da), a pre-Greek root meaning "earth," and μήτηρ (mētēr), meaning "mother."

The word Δημήτηρ in the context of Greek culture extended to signify things related to agriculture, such as "the harvest" or "grain" (e.g., Δημήτριος καρπός, meaning "fruit of Demeter" or "grain"), and she was often invoked in agricultural rituals and oaths. Δημήτηρ was considered the protectress of the earth's fertility and the sustenance it provides.

In later contexts, the name also referred to the worship of Isis in Egypt (syncretic religious practices in the Hellenistic period), with Δημήτηρ Αἰγυπτίη (the "Egyptian Demeter") referring to Isis, the Egyptian goddess who shares many attributes with Demeter, particularly in her role as a mother and goddess of fertility.

(cf. Bailley Δη·μήτηρ)