SilveroFoxo,
Sorry, but I can't help you out directly w.r.t. BOYD genealogies in the area.
[However, I will send you a PM with some local anecdotes gleaned from 1950's memories!]
You should certainly check out the surname within the McKINNEY "stud books" for Carnmoney and the Tennison GROVES extracts at PRONI.
[W.F.McKINNEY was a local genealogist, a great friend of The Revd. QUERN.]
Your William BOYD was presumably employed at the mills in Doagh.
Most likely housed there by the employer - work days were long, so commuting was not an option ...
[Else at nearby Cogry (Coggrey) a few miles away, where BOYDs ran a finishing works.
There is mention of this in the 1830's OS Memoirs, and also in the 1880 Co. Antrim Directory.]
The BOYDs came in to Ulster mainly in North Antrim (Ballycastle) and at Newtownards, Co. Down.
BOYDs were in the Ballyblack townland in this latter location.
Our family's oral tradition has our possible origin from this area ...
[Tentative theory is that they may have been brought up from there to Ballycraigy by Francis TURNLY when he purchased that townland from Lord Donegall in the 1790s, moving up to the Belfast area (Hollywood) after his brewery business failed in Newtownards town.]
BOYDs owned lots of business e.g. quarries in Ballyhenry (?).
[Also the company who took over the Bushmills whiskey production in the 20thC!]
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The DEBOYS surname is a rich theme.
A single French Hugenot family who arrived in Ulster via Scotland.
[Timeframe presumably shortly after King Louis XIV's had removed tolerance of religious freedom, by revoking the Edit of Nantes on 22-OCT-1685. Frenchmen sympathetic to Protestant ideas - estimated at as much as 40% of the population - feared a repeat of the pogrom of 1572, ably depicted earlier by a Francios DUBOIS ...
http://en.wikipedia.org/wiki/Fran%C3%A7ois_Dubois ]
A myth (started in St. CLARKE's "30 Centuries in SE Antrim"?) hinted that several Hugenot soldiers from the Williamite armies had settled Kingsbog in the 1690s - based on the presence of surnames like MARTIN, MONTGOMERY, DEBOYS, etc. - but this is not generally supported by modern-day local opinion!
Hugenot linen weavers settling in Ireland (Dublin, Port Arlington, Lisburn, etc.) initially had their own churches but were gradually melded in to the established (CoI) church.
[Though the BREAKEY family chose to be Pb.]
Will try to put you in touch with the main DEBOYS researcher.
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We have a photo of the Rockview Darts Club at Kingsmoss dating from 1950.
[Courtesy of the late Jimmy BEGGS.]
A very dapper Bobby DUBOIS was present!
Capt. Jock