Wales following unification under Henry VIII in 1536. A four-year study led by the University of the West of England, which concluded in 2016, analysed sources dating from the 11th to the 19th century to explain the origins of the surnames in the British Isles. The study found that over 90% of the 45,602 surnames in the dictionary are native to Britain and Ireland, with the most common in the UK being Smith, Jones, Williams, Brown, Taylor, Davies, and Wilson. The findings have been published in the Oxford English Dictionary of Family Names in Britain and Ireland, with project leader Professor Richard Coates calling the study "more detailed and accurate" than those before. He elaborated on the origins: "Some surnames have origins that are occupational – obvious examples are Smith and Baker. Other names can be linked to a place, for example, Hill or Green, which relates to a village green. Surnames that are 'patronymic' are those which originally enshrined the father's name – such as Jackson, or Jenkinson. There are also names where the origin describes the original bearer such as Brown, Short, or Thin – though Short may in fact be an ironic 'nickname' surname for a tall person." Modern era During the modern era, many cultures around the world adopted family names, particularly for administrative reasons, especially during the age of European expansion and particularly since 1600. Notable examples include the Netherlands (1795–1811), Japan (1870s), Thailand (1920), and Turkey (1934). The structure of the Japanese name was formalized by the government as family name + given name in 1868. Nonetheless, the use of surnames is not universal: Icelanders, Burmese, Javanese, and many people groups in East Africa do not use family names. Family names sometimes change or are replaced by non-family-name surnames under political pressure to avoid persecution. Examples are the cases with Chinese Indonesians and Chinese Thais after migration there during the 20th century or the Jews who fled to different European countries to avoid persecution from the Nazis during World War II. Other ethnic groups have been forced to change or adapt surnames to conform with the cultural norms of the dominant culture, such as in the case of slaves and indigenous people of the Americas. Family name discrimination against women King Henry VIII of England (reigned 1509–1547) ordered that marital births be recorded under the surname of the father. In England and cultures derived