undertenant

from The Collaborative International Dictionary of English v.0.48
Undertenant \Un"der*ten`ant\, n.
   The tenant of a tenant; one who holds lands or tenements of a
   tenant or lessee.
   [1913 Webster]
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
UNDER-TENANT. One who holds by virtue of an underlease. (q.v.) See 
Subtenant.
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