libertas (feminine, also libertatis {libertasatis?}) - Latin for freedom , liberty, independence; freedom of speech, frankness, candor.
Libertas - when capitalized, indicates the personification (goddess?) of Liberty.
Libertas depicted on the back of a 3rd century A.D. Roman coin: 
"[Libertas] is often depicted under the figure of a woman standing, with a cap or hat (pileus) in her right hand, and holding in her left a hasta [(a spear, lance, or pike)], or perhaps that particular wand which the Romans called rudis or vindicta, with which slaves were slightly struck at the moment of their emancipation." [1]
Latin Root: liber
Note also: Liber -eri (m.) - an Italian deity , identified with Bacchus.
Liberty Cap - Pileus - Symbol of Libertas
pileus -- Latin for "cap". Pileus indicated, in particular, the "cap of liberty"; this was a felt skullcap given to former slaves who had been granted their freedom, hence its use as a symbol of Libertas (Liberty).
Here you can
see the pileus on a rare coin commerating the Ides of March:
(For more information, please see the article Brutus from
the Dictionary of Roman Coins.)
"A round brimless hat with a flat top in the centre of which is a button."
See also: liberty, lyberty
