Alan Pardew dumped him last season, and he would have been in an embarrassing position had he stayed at St James' Park, with cries from supporters for Jonas to return to the first team squad.
Jonas only left hospital in Argentina last November following treatment for testicular cancer.
However, he is now back with Newcastle, playing for their U21s, and on Monday night he scored an absolutely brilliant strike against Bolton.
The 31-year-old struck a superb volley from 30-yards that ended up right in the 'postage stamp' are of the top right hand corner of the net.