Fixed family names were adopted in Wales from the 15th century onwards. Until this point, the Welsh had a patronymic naming system.
Patronymic names changed from generation to generation, with a person's baptismal name being linked by ap, ab (son of) or ferch/verch (daughter of) to the father's baptismal name to perhaps the seventh generation. For example, Evan son of Thomas would be known as Evan (ap) Thomas; Evan's son, John would be John (ab) Evan; John's son Rees would be Rees (ap) John; and David's son, James, would be James (ap) David.
NOTE: Fitz (pronounced "fits") is a prefix in patronymic surnames of Anglo-Norman origin, that is to say originating in the 11th century. The word is a Norman French noun meaning "son of", from Latin filius (son), plus genitive case of the father's forename.Whilst Fitz is now the standard form used by modern historians the word appears in ancient documents with various spellings such as fiz, filz, etc. The word has developed in modern French to fils de, with which it is thus cognate.
↑ First-hand information as remembered by Kath Gonzales, Thursday, June 26, 2014. Replace this citation if there is another source.
Source: S-1882022618 Repository: #R-2145420208 Title: Middlesex, England, Extracted Parish Records, Author: Ancestry.com Publication: Online publication - Provo, UT, USA: Ancestry.com Operations Inc, 2001. Original data - Electronic databases created from various publications of parish and probate records.
Source: S-2114063040 Repository: #R-2145420208 Title: UK, Extracted Probate Records Author: Ancestry.com Publication: Online publication - Provo, UT, USA: Ancestry.com Operations Inc, 2009. Original data - Electronic databases created from various publications of probate records.
Source: S-2118882068 Repository: #R-2145420208 Title: U.S. and International Marriage Records, 1560-1900, Author: Yates Publishing Publication: Online publication - Provo, UT, USA: The Generations Network, Inc., 2004. Original data - This unique collection of records was extracted from a variety of sources including family group sheets and electronic databases. Originally, the information was derived