Born: not known but died 10 March 1800.
Son of: Robert Dunbar (1697?-1782?) and Jean Miller (17??-1788).
Brother of: John Dunbar who married Janet Grant.
William married: Jean (or Jane) Dunbar (nee Morthland) (1747?-1815), daughter of Mathew Morthland of Rhindmuir.
They had issue:
1. Robert Dunbar (1785-1804).
2. Ann Raymond Heath (nee Dunbar) who married George Heath (1779-1852).
3. Matthew Charles Dunbar (1789-1819).
4. Jane Robina Sneyd (1791-?, nee Dunbar) who married Captain Ralph Henry Sneyd, HEICS, 1st Bengal Cavalry, later Commander of the Governors Generals Boy Guard, in 1817 at St. Georges, Hanover Square, London.

We know about William Dunbar from the book "Records of the Heath Family", by George Heath 1907.  The entry reads as follows:

We know about William Dunbar from the book "Records of the Heath Family", by George Heath 1907.  The entry reads as follows:

William Dunbar, second son of Robert Dunbar, minister of Dyke, "of Finch Lane, in the city of London, notary publick and also an honorary barrister-at-law of the Middle Temple Society, and Jane Morthland of Rhindmuir, in the Parish of Old Monkland and county of Lanark, North Britain, Esquire, were married at Rhindmuir, 12 July 1784.
"Their first child, Robert ,was born on the 26th of November, 1785.
"Our second child, a daughter, named Ann Raymond, was born at our house at Walworth on the 15th August, 1787.
"Our third child, a son, named Mathew Charles, was born at Nicholas Lane on 18th February, 1789.
"Our forth child, a daughter, was born on 22nd July, 1791, and named Jane Robina.
"The above William Dunbar expired on 10 March, 1800, at his house at Pentonville.  The enterrement took place on the Saturday following in the Dissenters' burying ground.
"Robert, eldest son of the above William Dunbar, died at Dominica on the 7th September, 1804, aged 19 years.
"Jane, wife of the above William Dunbar, died at Pentonville on the 26th September, 1815.  The funeral took place on the 3rd of October at Bunhill Fields burying ground."

The following is an example of William Dunbar's work as a Notary Publick.  This legal document is regarding the transfer of money.  It reads as follows:

£100Sterling Exchange 40 per Cent No.356 Jamaica, April 23rd 1778.

At Ninety days after sight of this second per Exchange (first not paid)

Pay to the Order of Thomas Gray Esq. One hundred Pounds sterling value Received which place as advised by   John Braine

To John Biggen Esq.

London

Indorsed, Pay Messrs Edward & René Payne or order Value in Account Thom Gray. Edward & René Payne.

On the Fourteenth Day of October in the Year of Our Lord One Thousand Seven Hundred and Seventy Eight at the Request of Messrs Edward and René Payne of London Merchants I William Dunbar Notary Publick duly admitted and Sworn Dwelling in London Exhibited the Original first Bill of Exchange of the same tenor and Date with the Original Second  Bill of Exchange whereof the aforegoing is a copy to a Gentlewoman at the House of Robert Biggin Esq. Son and Executor of the late John Biggin Esq. deceased, upon whom the said first and Second Bills were drawn, which said Robert Biggin had on the Thirteenth day of July last, accepted the said Original first Bill of Exchange, and I demanded payment of the sum of money due by the said Bills, (the time therein limited for payment thereof being Elapsed since the Acceptance thereof thereon made as aforesaid by the said Robert Biggin on the first of the said Bills) Whereunto the said Gentlewoman Answered that the said Robert Biggin was not at home, and had left no Orders with her concerning the said Bill, nor any other Bill of the same Tenor and date therewith.

Whereupon I the said Notary at the request aforesaid, have Protested and by these Presents do Solemnly Protest against the Drawer and the Indorsor of the said Second Bill of Exchange, as well as the Acceptor, Drawer, and Indorsor of the said first Bill of Exchange and all others, concerned for Exchange,Re-exchange and all Costs, Damages, Interest and Charges, already incurred, and to be hereafter incurred, for want of payment of the sum of money due by the said first and second Bills of Exchange. Thus done and Protested at London aforesaid, in the Presence of John Lewis Lefebre and William Hutchinson Witnesses

In Testimonium Veritatis

William Dunbar

Not. Pub.

1778

Afterwards

Bill of

  Exchange by William Dunbar Notary Publick. Click for larger image.

Afterwards on the tenth day of December in the year aforesaid I the said Notary at the request aforesaid Exhibited the Original first Bill of Exchange of the same Tenor and date with the Original Second Bill of Exchange whereof a true Copy is to the annexed Protest Prefixed, to Mr Bell the Clerk of the said Robert Biggin, the Acceptor of the said Original first Bill, and again demanded payment of the Sum of Money due by the said Bills, whereunto he answered on behalf of the said Robert Biggin that the Sum of Money due by the said first and second Bills of Exchange would certainly be paid tomorrow or next day, whereupon I the said Notary in presence of the said Witnesses have persisted to protest as aforesaid

In forma actum ut ante

William Dunbar

Not. Pub. 1778

Afterwards on the seventh day of January One thousand Seven Hundred and Seventy Nine, the said Notary at the request aforesaid Exhibited the Original Second Bill of Exchange in the above mentioned to a Clerk at the House of Robert Biggin Esquire the Acceptor of the first Bill of Exchange of the same tenor and date with the said second Bill of Exchange and (the said first Bill of Exchange not being paid) I demanded payment of the Contents of the said Second Bill of Exchange Whereunto the said Clerk answered on behalf of the said Robert Biggin that the sum of money contained in the said first and second Bills of Exchange could not be paid at present. Whereupon I the said Notary have persisted and by these presents do persist to protest in manner and form aforesaid.

In Forma Actum ut Ante

William Dunbar

Not. Pub.

Prot. Non pay’t 6/9

Post Act 1/1

2nd Act Non Payment at Lambeth 5/-

Charges on 1st Bill 12/9

10/3

£1:3:

If you have any further information please do contact me.