Quick answer
Tiberius is a boy name meaning "of the Tiber".
Pronunciation: Latin /ti.ˈbe.ri.us/; English /taɪ.ˈbɛɹ.i.əs/.
Meaning and history
Roman praenomen, or given name, meaning "of the Tiber" in Latin. The Tiber is the river that runs through Rome. Tiberius was the second Roman emperor, the stepson of Emperor Augustus. He was born Tiberius Claudius Nero, but was renamed Tiberius Julius Caesar after he was designated as the heir of Augustus.
Notes and context
Usage: ancient roman