Davies is a patronymic Welsh surname meaning "son of David".
[citation needed] There are two main theories concerning the surname's origin, though neither have been proven.
The first theory states that it may stem from the Kingdom of Dyfed, a medieval Welsh kingdom located in modern-day Carmarthenshire; however, the origin of the kingdom's name is itself disputed, with the most commonly accepted theories being that it was founded by the powerful Irish Déisi dynasty in the third century[4] or that it otherwise derives from the name of the Demetae people.
[5] "Dyfed" as a surname and the related forename "Dafydd" appear from the 12th century, with the latter generally translated into English as "David".
The second theory about the origin of "Davies" contends that it may derive directly from the Hebrew name "David", which is also the name of Wales' patron saint.