The name Brentley is an English surname that has been adopted as a given name in more recent times. It is believed to be derived from the Old English words "brent" meaning burnt or brown, and "leah" meaning a meadow or clearing.

Brentley likely originated as a place name referring to a burnt or brown meadow or clearing. The earliest recorded use of the name Brentley as a surname dates back to the 13th century in England, where it was used to identify people from a particular location bearing that name.

While the name Brentley does not appear to have any direct references in ancient texts or religious scriptures, its components "brent" and "leah" can be traced back to Old English, which was the language spoken in parts of Britain from the 5th to the 11th centuries.

One of the earliest recorded individuals with the name Brentley was Sir John Brentley, an English landowner and knight who lived in the 14th century. Another notable figure was William Brentley, a 16th-century English clergyman and author who wrote several religious works.

In the 17th century, Brentley Higgins (1592-1674) was an English politician and member of parliament. Around the same time, Richard Brentley (1628-1700) was a prominent English churchman and educator who served as the Master of Emanuel College, Cambridge.

Moving into the 18th century, Brentley Coxe (1734-1786) was an American poet and playwright active during the colonial era. He is best known for his satirical works criticizing the British rule in America.

It is worth noting that while the name Brentley has a long history as a surname, its usage as a given name is a more recent development, likely starting in the 20th century. The name's rise in popularity as a given name may be attributed to the trend of adopting surnames as first names, particularly those with a more distinctive or unique sound.