Quick answer
Vespasian is a boy name meaning "west, evening; wasp".
Pronunciation: English /vɛs.ˈpeɪ.ʒi.ən/; English /vɛs.ˈpeɪ.ʒən/.
Meaning and history
This name comes from the Roman cognomen Vespasianus, derived from a family name Vespasius, itself derived from either Latin vesper meaning "west, evening" or vespa meaning "wasp". This was the name of a 1st-century Roman emperor, Titus Flavius Vespasianus, the founder of the Flavian dynasty.
Notes and context
Usage: history