Conversation so far:
What language did the Etruscan civilization speak?
Knowledge of the Etruscan language is still far from complete. Since Rix (1998), it is widely accepted that the Tyrsenian family groups Raetic and Lemnian are related to Etruscan.
Are there any other interesting aspects about the Etruscan civilization article?
No etymology exists for Rasna, the Etruscans' name for themselves.
What is etymology?
Etymology is the study of the origin of words and the way in which their meanings have changed throughout history.

Question: Why did Pittau think it meant beardless?
Self-contained rewrite: Why did Pittau think 'Estruscans' mean beardless?