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To Giacomo:
"PETRA", is definetely greek and means stone.

(Jesus said "You will be called Peter because on this stone I'll
build the Church")

Ciao
Yannis
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All these words are derived from Sanskrit VAJRA, 'diamond, thunderbolt', because this is the oldest known language.
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My point was that Giacomo was not giving the meaning of
this "latin" word "petra"...
Does "petra" mean anything in latin? I don't know and I
would like to know.

Regarding the Sanskrit etymology, I don't know; I accept
your opinion. But I feel that "petra", "Petros", "Pedro" etc
are much closer to each other than to the ancient origin
VAJRA.

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Well, petra does in fact mean stone, rock, crag. See http://www.perseus.tufts.edu/cgi-bin/resolveform?lang=Latin. I should have kept quiet about VAJRA though. I don't know where I got that from. It may be more likely that the real origin is sanskrit PRASTARA 'stone'...
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Thank you!This webpage (Perseus) is really great!

Thank you
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