Rhys (often spelled Rhŷs in Welsh) is a Welsh masculine given name with deep historical roots. It derives from the Old Welsh name Ris, likely meaning "ardour, enthusiasm." The name is closely associated with Welsh royalty and medieval resistance, particularly Rhys ap Gruffydd (1132–1197), a ruler of Deheubarth who famously fought against the invading Normans. The name has persisted through the centuries, remaining a staple in both Wales and English-speaking countries. Pronounced [r̥ɨːs] in North Wales (with a voiceless r) and [r̥iːs] in the south, the name is anglicized as REESS in English. Reece, Rees, and Reese are common English variants, while Ris is the original Old Welsh form. Many modern surnames, particularly in Wales, derive from this given name, including Price, Pryce, Reese, and Rice (the English form). Several notable Welsh figures have borne this name across history. Rhys ap Tewdwr (died 1093) was a prince of southern Wales in the late 11th century, constituting the Deheubarth dynasty. Sir Rhys ap Gruffydd (died 1356) was a knight of the 14th century, and Rhys ap Thomas (1449–1525) played a pivotal role in the victory of Henry Tudor at Bosworth Field. A less scrupulous figure, Rhys ap Gruffydd (died 1531), was executed as a rebel during the reign of Henry VIII. Meaning: Ardour, enthusiasm Origin: Old Welsh Ris Type: Given name (male), also a surname Usage: Welsh, English Related forms: Reece, Rees, Reese, Price, Rice (surname)