1) Liberator 2) Manumitter 1) Manumitter 
• (n.) One who emancipates.
(from the article `Jonesborough`) ...was designated the capital and John Sevier the state`s first and only governor; the capital was moved to Greeneville in 1785. The state of ...
E·man'ci·pa`tor noun [ Latin ] One who emancipates. 
[n] - someone who frees others from bondage
emancipator 1. Someone who emancipates. 2. Someone who frees others from bondage; for example, 'Lincoln is known as the Great Emancipator.'
manumitter noun someone who frees others from bondage; `Lincoln is known as the Great Emancipator`