BB: Pretty sure that William is the son of Henry Boyd of Lismoyle in the 1858 Griffiths Valuation.
It is possible that the William Boyd who married Sarah Cooke is a brother of Hugh Boyd. I have an early bap record for William Boyd in 1846 but he would have been much older than Sarah Cooke who was born in 1863 - still possible.
This is Hugh Boyd:
Record Type Civil Marriage
Date of Marriage 27 Apr 1861
Groom Name Hugh BOYD
Bride Name Elizabeth SCOTT
Church Curran Presbyterian Church
Parish Maghera
Civil District Magherafelt
County Londonderry
I believe he is the Hugh Boyd baptized in Feb 1843, Boveedy, son of Henry Boyd.
Here is a child for Hugh Boyd and Elizabeth Scott - not in the 1901 Census....but his name sure ties a alot together!!
JOSEPH ALEXANDER BOYD Birth: 20 JUN 1869, Londonderry, Ireland, Father: HUGH BOYD, Mother: ELIZABETH SCOTT.
Is this a link to the Joseph and Alexander Boyd who may have moved to Collins and be connected to Gage Boyd, which would explain why Gage is back living amongst these people in Lismoyle?