Gawen Brown was born in England in 1719 and died in Boston at the age of 82 in 1801. It is recorded that he came to this country sometime before 1749. It is in that year, on February 6th, that he advertised in The Boston Evening Post that he was a '…Clock and Watchmaker lately from London, Keeps his shop at Me. Johnson’s Japanner, in Brattle Street, Boston, near Mr. Copper’s Meeting House, where he makes and sells all sorts of plain, repeating and Astronomical Clocks, with cases plain, black walnut, mahogany or Japanner or without.” During his lifetime, much was written about his making and installing a tower clock at the Old South Church in Boston. The Old South Church was erected in 1730 without a clock. Brown installed his clock sometime between 1768 and 1770. Between the period of 1752 and 1760, Brown moved his shop and home several times. He married three times and had a total of twelve children. On April 5, 1750, Brown married Mary Flagg. Together they had six children before she died in 1760. She was only 31 years old. His second wife, Elizabeth Byles, was the daughter of Mather Byles. Mather was a famous clergyman who presided over the Hollis Street Church. Elizabeth lived only three more years and had no children. She died in 1763. In 1764, Brown married Elizabeth Hill Adams. Elizabeth was the widow of Dr. Joseph Adams who was the brother of Samuel Adams. Elizabeth bore him six more children. Based on a number of newspaper advertisements, Brown imported a number of English clocks and watches from England. During the period of 1789 through 1796, Brown is listed in the business directories as a watchmaker.

Received this via 'note chat'
Had to copy here to read it all from Anonymous 50559899 Oct 1 2020
Picture of Gawen Brown
Which is published as a frontpiece 2 pages before Vol 8 August 1918 No 2 title page of ICC Quarterly
https://www.google.com/books/edition/Veteran_I_C_C_Quarterly/tO88utpra1wC?hl=en&gbpv=1&dq=Major+Gawen+Brown&pg=PA99-IA34&printsec=frontcover

have't found a date of Date for Elizabeth Hill but the Massachusetts Archives for 1780 Chapter 187 have a petition from Gawen Brown to act as guardian for 4 of his minor children: William; Elizabeth; Katherine and Ann in regards to selling of land in Hillsborough New hampshire owned by a John Hill. That night send an interesting line of Inquiry if it was found that John Hill was Elizabeth Hill's father.

Ref:
https://www.google.com/books/edition/The_Acts_and_Resolves_Public_and_Private/BVxHAAAAYAAJ?hl=en&gbpv=1&dq=Katherine+daughter+of+Gawen+Brown&pg=PA614&printsec=frontcover

In regard to his other Children besides Mather Brown:
°Major Gawen Brown served in the American Revolution married an Englishwoman and settled on a Plantation in Virginia
°John F. Brown also served in the American Revolution and died age 78 at "Pilot island" St John River Florida
Margaret Brown
°Catherine Hinshaw Brown {Anonymous researching}
°Ann Brown
°William Hill Brown b. 1766-d.2 Sep 1793 Murfreesboro North Carolina of a cold while out riding his horse . He was a poet and playwright of some note
Ref:
https://www.google.com/books/edition/The_Bostonian/Ro9GAQAAIAAJ?hl=en&gbpv=1&dq=Son+of+Gawen+Brown&pg=PA230&printsec=frontcover

Gawen Brown moved to Boston from Nothumbria in England and established himself as one of the finest clockmakers in the colonies. In Boston his clocks can still be found ticking in the Old State House and in the tower of the Old South Meeting House. The man behind the clocks lived a fascinating life and the children he raised went on to become painters and poets carrying on the artistic legacy of the family.

One reference :http://delaneyantiqueclocks.com/products/maker/41/