Tacitus
The Roman name Tacitus, famous for the “historian” and the emperor, means “silent”, but also “hidden” & “secret”.
Latin tacitus, tectus = silent, guarded, hidden, secret
tacitus : in silence, not spoken of, kept secret, unmentioned; done without words, assumed as a matter of course, silent, implied, tacit; secret, hidden, concealed — Latin (Wikt)
tectus : covered, concealed, hidden; sheltered, protected, guarded, defended; roofed; reserved, cautious, secretive — Latin (Wikt)