The name Gregg is an English given name derived from the Old English word "græg," which means "gray" or "greyhair." It is believed to have originated in the Anglo-Saxon period, which lasted from the 5th to the 11th century in Britain.

The earliest recorded use of the name Gregg dates back to the 12th century, when it appeared in the Domesday Book, a comprehensive record of landowners and their holdings in England and Wales commissioned by William the Conqueror in 1086. In the Domesday Book, Gregg is listed as a surname, suggesting that the name was already in use as a given name before that time.

One of the earliest recorded individuals with the name Gregg was Gregg of Fife, a Scottish nobleman who lived in the 13th century. Gregg of Fife was a prominent figure in the Scottish Wars of Independence against England, and he fought alongside William Wallace and Robert the Bruce.

Another notable figure with the name Gregg was John Gregg, an English calligrapher and educator who lived from 1806 to 1888. Gregg is best known for developing the Gregg shorthand system, which became widely used in the United States and other countries for taking dictation and recording notes.

In the 20th century, one of the most famous individuals with the name Gregg was Gregg Toland, an American cinematographer who lived from 1904 to 1948. Toland is best known for his innovative camera work on films such as "Citizen Kane" and "The Grapes of Wrath," and he is considered one of the most influential cinematographers in the history of cinema.

Another notable Gregg was Gregg Allman, an American singer-songwriter and musician who lived from 1947 to 2017. Allman was a founding member of the Allman Brothers Band, and he is widely regarded as one of the most influential and talented rock musicians of his generation.

Finally, Gregg Popovich is a legendary basketball coach who has been the head coach of the San Antonio Spurs since 1996. Popovich was born in 1949 and has led the Spurs to five NBA championships, cementing his place as one of the greatest coaches in NBA history.