The latter part may be a corrupted form of
IANUA Hecate AER
meaning something like (make or come)Doorway Hecate in the Air
Her attributes of KEYS and GATEKEEPER make sense in that way (DOOR)
Could be
EIA CATEIA ICERE Hekate
meaning something like Come with your javelin (i want to make) a treaty Hekate
The Greek meaning of ‘to dart’ can be stretched here to a javelin maybe.
Yes, and in ancient Egyptian HEKA means Magick and TI means Give. But I know no one will agree with me on that 