praenomen

from WordNet (r) 3.0 (2006)
praenomen
    n 1: the first name of a citizen of ancient Rome
    
from The Collaborative International Dictionary of English v.0.48
Praenomen \Pr[ae]*no"men\, n.; pl. {Pr[ae]nomina}. [L., fr. prae
   before + nomen name.] (Rom. Antiq.)
   The first name of a person, by which individuals of the same
   family were distinguished, answering to our Christian name,
   as Caius, Lucius, Marcus, etc.
   [1913 Webster]
    

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