Quick answer
Rhys is a boy name meaning "ardour, enthusiasm".
Pronunciation: Welsh /ˈr̥iːs/; Welsh /ˈr̥ɨːs/; English /ˈɹiːs/.
Meaning and history
From Old Welsh Ris, probably meaning "ardour, enthusiasm". Several Welsh rulers have borne this name, including the 12th-century Rhys ap Gruffydd who fought against the invading Normans.
Notes and context
Usage: welsh, english