FastNamesWelsh Names and Surnames
Welsh names belong to the Celtic (Brittonic) linguistic family, reflecting centuries of cultural evolution, geographic migration, and historical naming traditions.
Historical and linguistic background
Welsh names represent a surviving branch of the ancient Insular Celtic Brittonic language, with historical roots predating Roman and Anglo-Saxon presence in Britain. For centuries, the Welsh employed a patronymic system using the particle ap or ab (contracted from mab, meaning 'son'), identifying individuals through multiple ancestral generations, such as Dafydd ap Llywelyn ap Iorwerth. Following the incorporation of Wales into the Kingdom of England under Henry VIII's Acts of Union (1536–1543), English judicial courts required Welsh families to adopt permanent hereditary surnames. Because the Welsh baptismal pool was relatively compact, families transformed ap-patronymics into genitive English-style surnames ending in -s, creating ubiquitous surnames like Jones (John's), Williams (William's), Davis (David's), Thomas, and Evans. Welsh given names like Dylan, Megan, and Rhys have also achieved widespread popularity in modern America.
Naming traditions and patterns
Historically used patronymic strings with ap/ab ('son of'), which converted during the sixteenth century into fixed patronymic surnames characterized by a final -s, alongside ancient Brittonic personal names.
Published Welsh first names
| Name | Meaning | Rank (2025) | US Births |
|---|---|---|---|
| Dylan | Derived from Welsh dy ('great', 'towards') and llanw ('tide', 'flow', 'surge'), signifying 'great wave', 'son of the sea', or 'tide'. | 41st | 434,951 |
Published Welsh surnames
| Surname | Meaning | Census Rank | US Bearers |
|---|---|---|---|
| Adams | Patronymic surname derived from the biblical personal name Adam (from Hebrew Adamah, meaning 'earth', 'ground', or 'red clay'), signifying 'son of Adam'. | 42nd | 427,865 |
| Davis | Patronymic surname meaning 'son of David' (or Davy), from the Hebrew personal name Dawid ('beloved'). | 8th | 1,116,357 |
| Harris | Patronymic surname meaning 'son of Harry', Harry being the standard medieval English spoken vernacular form of Henry (from Germanic Heinrich, 'home ruler'). | 25th | 624,252 |
| Jones | Patronymic surname meaning 'son of John' (or 'son of Jone', a common medieval pronunciation and spelling of John). | 5th | 1,425,470 |
| Lewis | Patronymic and baptismal surname with multiple lineages: an Anglicization of the Welsh personal name Llywelyn ('leader' or 'lion-like'), or derived from Norman French Louis (Germanic Chlodovech, 'famous in battle'). | 29th | 531,781 |
| Phillips | Patronymic surname derived from the Greek personal name Philip (Philippos, 'lover of horses'), meaning 'son of Philip'. | 52nd | 360,802 |
| Roberts | Patronymic surname derived from the Germanic personal name Robert ('bright fame'), signifying 'son of Robert'. | 50th | 376,774 |
| Thomas | Patronymic and baptismal surname derived from the biblical Aramaic personal name Ta'oma (תָּאוֹמָא), meaning 'twin'. | 16th | 756,142 |
| Williams | Patronymic surname meaning 'son of William', from Germanic wil ('will, desire') and helm ('helmet, protection'). | 3rd | 1,625,252 |
Scholarly references and sources
- Welsh Surnames — T.J. Morgan, Prys Morgan (1985), pp. 1-35.
- A Dictionary of English and Welsh Surnames — Charles Wareing Bardsley (1901), pp. 18-26.