disheritor

from The Collaborative International Dictionary of English v.0.48
Disheritor \Dis*her"it*or\ (d[i^]s*h[e^]r"[i^]t*[~e]r), n. (Law)
   One who puts another out of his inheritance.
   [1913 Webster]
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
DISHERITOR. One who disinherits, or puts another out of his freehold. 
Obsolete.
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