Jebus is one of the first names of Jerusalem.
It is mentioned in the Bible several times:

" ...and (he) came over against Jebus, which is Jerusalem." (Judges 19:10).

The Jebusites, the residents who defended the city against King David,
were probably of Caananite origin, as mentioned in Ezekiel 16:3:

"...thy father was an Amorite, and thy mother a Hittite."