Dai is a given name. In Welsh it's a masculine given name, a hypocorism of Dafydd or David, as well as a masculine Japanese given name. Notable people with the name include:
Dai Ailian (1916–2006), Chinese dancer Dai Andrews (born 1977), American performance and visual artist Dai Baldé (born 2006), Bissau-Guinean footballer Dai Bingguo (born 1941), Chinese politician and diplomat Dai Bradley (born 1953), English actor Dai Buell (1892-1939), American pianist and teacher Dai Davies (1880–1944), Welsh footballer Dai Davies (1948–2021), Welsh footballer Dai Davies (born 1959), Welsh politician Dai Greene (born 1986), a British hurdler , Japanese classical composer Dai Henwood (born 1978), New Zealand comedian Dai Jin (1388–1462), Chinese painter Dai Le (born 1968), Vietnamese-born Australian politician Dai Li (1897–1946), Chinese spymaster , Japanese voice actor Dai Dai N'tab (born 1994), Dutch long track speed skater Dai Nagao, Japanese composer, musician and producer , Japanese basketball coach Dai Qing (born 1941), Chinese journalist , Japanese screenwriter and musician Dai Sijie (born 1954), Chinese-French author and filmmaker Dai Vernon (1894–1992), Canadian magician Dai Wai Tsun (born 1999), Hong Kong-born Chinese professional footballer Dai Vernon (1894–1992), Canadian magician Dai Ward (1934–1996), Wales international footballer Dai Xi (1801–1860), Chinese painter Dai Yi (1926–2024), Chinese historian Dai Yongge, Chinese businessman and entrepreneur Dai Young (born 1967), Wales international rugby union player Dai Zhen (1724–1777), Chinese philosopher
Fictional characters Dai, the title character in the manga series Dragon Quest: The Adventure of Dai Dai Blackthorn, a character from the role-playing game GURPS Dai Bread, a bigamist character in Dylan Thomas' 1954 Radio play Under Milk Wood. Mrs Dai Bread One, Dai Bread's first wife. Mrs Dai Bread Two, Dai Bread's second wife. Dai Dickins, character in the Discworld novel Night Watch, and martyr of the Glorious Revolution Twenty-Fifth of May Dai Evans, character in the 1973 Doctor Who serial The Green Death Dai Greatcoat, a character from David Jones' In Parenthesis , a fictional character from the anime series Super Doll Licca-chan Dai Station, a character from the Welsh animation series Ivor the Engine Dai Bando, a minor character in Richard Llewellyn's novel How Green Was My Valley (novel), played by Rhys Williams in the John Ford film of the same name