Re·demp·tor·ist 
(r
ĭ-d
ĕmp
t
ər-
ĭst)
n. A member of the Congregation of the Most Holy Redeemer, a Roman Catholic order founded in 1732 by Saint Alphonsus Liguori (1696-1787).
[French rédemptoriste, from Late Latin redēmptor, redeemer, from Latin, contractor, from redēmptus, past participle of redimere, to buy back; see REDEEM.]