Local populations became entrenched, eschewing intermarriage with other groups and adopting a cultural pattern of what researchers
call endogamy, the practice of marrying only within an ethnic or social group.
That's because the Ashkenazi have what's
called endogamy, which is the practice of marrying within the community.
Not exact matches
There is actually a term for this
called «
Endogamy» which Wikipedia defines as, «The custom of marrying only within the limits of a local community, clan, or tribe.»