Complex sentence: Accompanied by a decline in monasteries and other communal institutions, social discord led to the emergence of untitled nobles called "hoofdelingen" ("headmen"), wealthy landowners possessing large tracts of land and fortified homes.
Split into simpler sentences: Accompanied by a decline in monasteries and other communal institutions the resultant social discord led to the emergence of untitled nobles called "hoofdelingen", literal translation headmen. The "hoofdelingen" were wealthy landowners possessing large tracts of land and fortified homes.