Having hit a 'brick wall' of 1790 with my immediate family from the City of London, I began collecting information of various families with the same name in the hope there may be a connection. The name was registered in the Spring of 2015 after visiting the SWAG fair at Weston, Somerset in the hope the research can be centralised and perhaps find that 'missing link'. 

Update November 2019:  Retirement and removing Candy Crush from my iPad (I reached level 4000) has allowed more time to build and connect family groupings in Somerset, London, Staffordshire/Worcestershire, Norfolk, Suffolk, Essex and Yorkshire.  There doesn't appear to be a common ancestor nor a common variant.  For instance, the Somerset branch appears to start with the name Morrell and 'overnight' becomes Bunn.  Other trees have come to an early end with the discovery that the the surname was adopted; the owner of the All England Jumping Course at Hickstead being one.  Increased time and contacts from Canada, USA, Australia and New Zealand have allowed branches to be connected back to various locations in the UK and increased details of Bunn's from those countries.

Nothing registered at this time.  The Oxford Dictionary of Family Names in Britain and Ireland lists Bun as a variant of Bunn.  Bunn is a variant of Bone as well as Bonn, Bonne, Bon, Boan, Bown, Boon, Boone, Bones and Bunce.

There are instances of the name changing when the family moves from one area of the UK to another ie Burn becomes Bunn from Norfolk to Yorkshire.  This could be down to regional accents and how the name was pronounced and heard in a different region.

Bohun as a variant came to the fore at the end of 2020 and there is a separate ONS for that name.

A.)   Bone is probably French in origin deriving from "bon" meaning "good" (1) and was originally given as a nickname.  
Ref:  Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.

      Note: I have yet to come across an instance of where the name changes from Bone to Bunn.  I have searched Huguenot records and found no Bon/Bunn connection. 

B.)   Bone could also be a Middle English nickname used to describe someone with a bad leg or long legs similar to Smallbone. Longbone or Legg.

C.)   "History of the Bunn Family of America" edited by James Alfred Ellis and available to read as an e book here: https://archive.org/details/historyofbunnfam00elli   looks at the first 3 Bunn families to arrive in America and how they migrated across the continent. 

In the forward the author discusses the origins of the surname Bunn in England and strongly suggests the name is German in origin, probably Von Bonn - meaning 'from Bonn'.  This was quickly rendered Bunne or Bohn by the English (I have found Bunn families using Bohun) and the use of Bunn as a surname is evident long before most English people adopted surnames. 

Note: In late 2020 I discovered Bunn Families in Brazil who had originated in Germany via England with the original name Bonne.  This led to the discovery of an established family in Germany with the surname Bunn (2020).

D.)    At one stage it was fashionable to add an 'e' to a surname, hence many records have families changing the name form Bunn to Bunne which later becomes Bunn as the 'e' is dropped.

Richard Bunn the elder is recorded in Suffolk 28 Jan 1274 paying a rent of 2d per acre per annum

John Bunne of Almaine, Germany "Long since came into England and has faithfully exercised the trade of saddler in the City of London" is dated in Westminster, 13 September 1378

Thomas Bunn, Dr, wife Bridgitt and son Thomas appear on a muster of the inhabitants in Virginia taken on January 30th 1624; they were among the earliest recorded name bearers to settle in America.

Alfred Bunn (1796 - 1860), was manager of Drury Lane and Covent Garden theatres in London from 1833 to 1848; brought English operas to London; has a portrait in the National Portrait Gallery; was declared bankrupt in December 1839 with debts exceeding £23,000 and was known as "Poet Bunn" in Punch.

From the 1881 census there were 2919 Bunns recorded giving a frequency of 97 per million or .01 of the population. Although there are now 5907 Bunn's in the UK according to the British surnames website, the frequency has fallen to 93 per million.

• There are 13,387 people in the U.S. with the last name Bunn.
• Statistically the 3078th most popular last name.

In the England and Wales 1881 census the most populous counties are Norfolk (619 entries), London (419 entries), Staffordshire (248 entries) and Worcestershire (212 entries).

The continually increasing study is available on Ancestry.co.uk and is called ONS Bunn.  As of May 2020 (1st UK lockdown) it had 16,266 and by Lockdown 2 (March 2021) it has grown to 22,000 people and by August 2021, 24,300.  I have included spouses but not their immediate families unless they had children named Bunn.  If it looks like there has been a 1st or 2nd cousin relationship, I have added other family relatives.

https://www.ancestry.co.uk/family-tree/tree/177811189/family/familyview?cfpid=392314113371&fpid=392335573360  (Bunn ONS) with myself as the home person but do search for the person you are looking for.  To distinguish between the many Bunn's with the same first name, I have started adding the place of birth as the Registration District and the GRO reference with mother's maiden name for England and Wales births.  

If you have any additional information, corrections, photos, certificates or assistance, please let me know.  I would especially like other Bunn's to join me in researching, adding citations and growing the tree.

I have a Y DNA with FamilyDNA and an Ancestry autosomal DNA test for myself but no project has been set up as far as I know.  As of March 2021 no connections have been made with 'other' branches apart from those in my primary London tree.