Woods was born in Cypress, California, to Earl (1932—2006) and Kultida (Tida) Woods (born 1944). He is the only child of their marriage but has two half-brothers, Earl Jr. (born 1955) and Kevin (born 1957), and one half-sister, Royce (born 1958) from the 18-year marriage of Earl Woods and his first wife, Barbara Woods Gray. Earl, a retired United States Army lieutenant colonel and Vietnam War veteran, was of mixed African American, Chinese, and Native American ancestry. Kultida (née Punsawad), originally from Thailand, is of mixed Thai, Chinese, and Dutch ancestry. This makes Woods himself half Asian (one-quarter Chinese and one-quarter Thai), one-quarter African American, one-eighth Native American, and one-eighth Dutch. He refers to his ethnic make-up as
“Cablinasian” (a syllabic abbreviation he coined from
Caucasian,
Black,
Indian, and
Asian).
From childhood he was raised as a Buddhist and actively practised this faith from childhood until well into his adult career. He has attributed his deviations and infidelity to his losing track of Buddhism. He said that "Buddhism teaches me to stop following every impulse and to learn restraint. Obviously I lost track of what I was taught."
At birth, Woods was given 'Eldrick' and 'Tont' as first and middle names. His middle name, Tont (), is a traditional Thai name. He got his nickname from a Vietnamese soldier friend of his father, Vuong Dang Phong, to whom his father had also given the Tiger nickname. He became generally known by that name and by the time he had achieved national prominence in junior and amateur golf, he was simply known as 'Tiger' Woods.}}