This post is an addendum to my previous post about the disciples preaching the Gospel of the kingdom to the whole then known world before the fall of Jerusalem. This addendum also shows the deaths of many of them.
Many other Jewish Christians were also dispersed to various countries and they also spread the Gospel wherever they went.
Peter - It is traditionally believed that Peter first traveled to Antioch and established a community there. ... After that he may have visited Corinth before heading to Rome. There he helped form the Christian community and was ultimately martyred in the Circus of Nero around 64.
Andrew - many ancient traditions point to Andrew, Peter’s brother, as the Apostle to the Greeks. It is believed that he preached to Greek communities and was martyred at Patras on a cross in the shape of an X.