J. Danielou is certain that the environment with which the Gospel of the Nazarenes should be associated is that of the Jewish Christians in Syria who spoke Aramaic and who were the most direct heirs of the Palestinian Jewish Christian community and from whom they received certain traditions. (religion-online.org)
Direct heirs include but aren't limited to a surviving husband or wife, children, parents or adopted children who are dependents of the decedent. (ccdlaw.com)
Understandably so: As the first - born of Prince William and Kate Middleton, little George is a direct heir to the throne. (entrepreneur.com)