Strong’s Greek
G3541 — nothos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
νόθος
nothos — pronounced noth'-os
of uncertain affinity; a spurious or illegitimate son:--bastard.
1 occurrence in the KJV.
Hebrews 12:8
But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons.