Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
fellow [ˈfɛləu] n (man) па́рень m (comrade) това́рищ; (of learned society) действи́тельный член; (of university) член сове́та
cpd
their fellow prisoners/students их сока́мерники/соку́рсники
his fellow workers его́ това́рищи по рабо́те
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.