This is the 5147th most frequent Russian word.
наследников
"Heirs" or "successors."
In this sentence, 'наследников' is the genitive plural form of 'наследник', indicating belonging or association with heirs.
Судья распределил имущество между наследников.
The judge distributed the property among the heirs.
Here, 'наследников' functions as an accusative plural direct object, referring to the heirs being met.
Мы встретили наследников старинного рода.
We met the heirs of an ancient lineage.
In this case, 'наследников' acts as a genitive plural, showing possession or close relation in the context of rights.