What is "tregoning"

Tregoning is a surname. Notable people with that name:

• Frank Tregoning, American shipyard owner, who built the civilian motorboat of the same name in 1907 of the USS Sans Souci II (SP-301).
• Ian Tregoning, producer and founder of Do It Records
• John Tregoning, (1840s–1920s), American mechanical engineer, who wrote the first books on factory management.
• Joseph E. Tregoning, (born 1941), former member of the Wisconsin State Assembly.
• Larry Tregoning, team captain at 1964–65 Michigan Wolverines men's basketball team
• Marcus Tregoning, horse racing jockey and trainer.
• Max Tregoning, founder of Do It Records
• Nick Tregoning, Liberal Democrat candidate in Wales (European Parliament constituency)