Usage: 3 forms in 22 verses
Form Translated As     In Verse(s)
κατόπισθεν after LXX.Gen.37.17LXX.Judg.19.3LXX.Ruth.2.2LXX.Ruth.2.9LXX.2Sam.2.19LXX.2Sam.16.18LXX.2Sam.20.14LXX.1Kgs.13.14LXX.2Chr.25.27LXX.Ezek.44.10LXX.Zech.6.6LXX.Zech.7.14
behind LXX.Judg.18.12
from behind LXX.1Sam.11.5LXX.Neh.4.13LXX.Ezek.41.15
from behind them LXX.2Chr.13.13
right after LXX.2Kgs.6.32
κατόπισθε after LXX.Ruth.2.3LXX.2Sam.2.27
κατόπισθέν after LXX.Prov.24.27
from behind LXX.Ezek.3.12

Liddell-Scott-Jones

κατόπισθεν (katopisthen) after G:PREP

κατόπισθεν-όπισθεν,

in Poets also κάτ-θε, adverb of Place, behind, after, [Refs 8th c.BC+]

__II of Time, hereafter, afterwards, henceforth, [Refs 8th c.BC+]