Well spotted! [I hadn't...
]
I was about to say quite possibly because he is from Cimmeria... we know the Goa'uld rounded up likely suspects from many planets - including Earth.
But of course, they couldn't have come to collect from Cimmeria - unless the person was very near the gate, and the Jaffa somehow managed to re-dial out very quickly. We don't really know if the Hammer only works if incomers try to leave the vicinity of the gate...
It is probably just an error - Hanno (Cor-Ai) is also Simon (in Demons).