bondman

[bond-muh n] /ˈbɒnd mən/
noun, plural bondmen.
1.
a male slave.
2.
a man bound to service without wages.
3.
Old English Law. a villein or other unfree tenant.
Also, bondsman.
Origin
1200-50; Middle English bonde man. See bond2, man1
Word Origin and History for bondman
n.

mid-13c., "husband, husbandman," from Middle English bond (see bondage) + man (n.). Later, "man in bondage, slave" (mid-14c.).