Clark McConachy, MBE (15 April 1895 – 12 April 1980) was a New Zealand professional player of English billiards and snooker.

His endurance and longevity as a sportsman was astonishing. He was the New Zealand professional billiards champion from 1914 until 1980. He also held the title of World Professional Billiards Champion from 1951 until 1968, when he was defeated by Rex Williams.

He was the runner-up in the World Snooker Championships of 1932 and 1952.

Clark was a keen advocate of physical fitness and regularly ran up to four miles every day. A strict teetotaller and non-smoker; he attributed his continued success well into his senior years to these things. He was also well known for walking around the table on his hands before the match started. He is a member of the New Zealand Sports Hall of Fame

Clark is an English surname in the English language, ultimately derived from the Latin clericus meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educated or a old man with a moustache. Clark evolved from "clerk". First records of the name are found in 12th century England. The name has many variants.

Clark is the twenty-seventh most common surname in the United Kingdom.

According to the 1990 United States Census, Clark was the twenty-first most frequently encountered surname, accounting for 0.23% of the population.

Clark is also an occasional given name, as in the case of Clark Gable.

Probably the most famouse person named Clark is Clark Kent a.k.a. Superman

People with the surname Clark include:

Ding Junhui (Chinese: 丁俊晖; pinyin: Dīng Jùnhuī; born 1 April 1987 in Yixing, Wuxi, Jiangsu) is a Chinese professional snooker player. Ding Junhui is China's most successful player ever, having become only the second teenager, after John Higgins, to win three ranking titles. As a prolific breakbuilder Ding has compiled more than 200 century breaks during his career.

In December 2006, he enrolled at Shanghai Jiao Tong University to study Business Administration and Management. He is a resident of England during the snooker season. He is good friends with fellow countryman Liang Wenbo and they are training partners in Sheffield World Snooker Academy.

Ding started playing snooker at the age of nine, when his father took him to the Chinese national team training centre near Shanghai. His father persuaded his mother to sell their house in order for Ding to continue playing snooker as a career.

Ding shot to international prominence in 2002, when he won the Asian Under-21 Championship, the Asian Championship and the IBSF World Under-21 Championship (became the youngest ever winner of the World Under-21 Championship at the age of fifteen). He was unable to progress much in 2003, as both the Asian Championship and Under-21 Championship had to be cancelled because of the SARS virus crisis, but he was a semi-finalist in the IBSF World Under-21 championship, and was awarded a Main Tour concession by the WPBSA, which enabled him to turn professional in September 2003. In 2003, he became the number one ranked player in China.

Judd Trump (born 21 August 1989) is an English professional snooker player from Bristol. He enjoyed considerable success in youth tournaments before turning professional in 2005. On 3 April 2011, Trump won his first ranking title, beating Mark Selby 10–8 in the final of the China Open. Following this success in China, he reached the final of the 2011 World Snooker Championship where he was defeated by John Higgins. He then went on to win the 2011 UK Championship where he defeated Mark Allen 10–8 in the final.

Trump was English Under-13 and Under-15 champion, and reached the World Under-21 Championship semi-finals at the age of 14. At the same age, he became the youngest player ever to make a competitive 147, beating Jamie Jones's record.

In the 2005/06 season he joined the professional tour, and at the Welsh Open became the youngest player ever to qualify for the final stages of a ranking tournament. He reached the same last-48 stage for the China Open, losing 4–5 to Michael Holt, although this was designated the final qualifying round and was actually played in Prestatyn, Wales.