These were Jews who had lived most of their lives somewhere in the Roman Empire outside of Israel, and had grown up speaking Greek. Their language and culture were somewhat different from those who had grown up in Israel.
## the Hebrews ##
These were Jews who had grown up in Israel speaking Aramaic. The church consisted of only Jews and converts to Judaism so far.
## widow ##
A true widow was a woman whose husband had died, was too old to get married again, and did not have any relatives to care for her.
## daily distribution of food ##
The money that was being given to the apostles was used in part to buy food for the early church widows.