This may be a long shot -
On Google Maps, about 5 km west of Liubavas/Lubowo, there is a town called Eyszeryszki, just inside Poland. I believe this would be pronounced something like Aisherishki, and it might be the Assaretz birth place.
About 7 km east of Liubavas/Lubowo, there is a town called Gabrieliskiai, and possibly this is the Gabess in the documents.
I can't find anything that would correspond to Pachicko or Poshika in the general area.
I'd still check and see where near relatives say they are from in their own documents.
Lock/Lak/Lok and Kalon in Zagare/Joniskis/Gruzdziai, Lithuania
Trisinsky/Trushinsky/Sturisky and Leybman in Dotnuva, Lithuania
Olitsky in Alytus, Suwalki, Poland/Lithuania
Gutman/Goodman in Czestochowa, Poland
Lavine/Lewin/Levin in Trenton, New Jersey and Lida/Vilna gub., Belarus