Katachthonios identifies those situated beneath the earth in the verse's threefold setting.

The attested use identifies those beneath the earth, set alongside those in heaven and on earth in Philippians 2:10.

1. Those beneath the earth · dominant

   In Philippians 2:10, the genitive plural masculine form occurs in the threefold sequence of those in heaven, on earth, and beneath the earth whose knees bend at Jesus' name; the APB renders the final setting "under the earth."

   Philippians 2:10

In the Anselm Project Bible: In Philippians 2:10, the APB presents the final member of the sequence as "under the earth." This confirms the clause's setting rather than isolating a precise English equivalent.