Hypertext Webster Gateway: "cognomen"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Cognomen \Cog*no"men\, n. [L.: co- + (g)nomen name.]
1. The last of the three names of a person among the ancient
Romans, denoting his house or family.
2. (Eng. Law) A surname.
From WordNet (r) 1.7 (wn)
cognomen
n 1: a familiar name (often a shortened version of a person's
given name); "Joe's mother would not use his nickname
and always called him Joseph" [syn: {nickname}, {moniker},
{sobriquet}, {soubriquet}]
2: the name used to identify the members of a family (as
distinguished from each member's given name) [syn: {surname},
{family name}, {last name}]
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