Old English freodom “power of self-determination, state of free will; emancipation from slavery, deliverance;” see free (adj.) + -dom. Meaning “exemption from arbitrary or despotic control, civil liberty” is from late 14c. Meaning “possession of particular privileges” is from 1570s. Similar formation in Old Frisian fridom, Dutch vrijdom, Middle Low German vridom.
liberty (n.)
late 14c., “free choice, freedom to do as one chooses,” also “freedom from the bondage of sin,” from Old French liberte “freedom, liberty, free will” (14c., Modern French liberté), from Latin libertatem (nominative libertas) “civil or political freedom, condition of a free man; absence of restraint; permission,” from liber “free” (see liberal (adj.)). At first of persons; of communities, “state of being free from arbitrary, despotic, or autocratic rule or control” is from late 15c.