There are a number of Peacocks in the records and I assume that they are related but I am uncertain as to how they are related. There was a William Peacock (Jr) and his wife Mary who buried a daughter in the Mfelt Church of Ireland in 1718 and baptised another in 1719. They had at least 8 children but the only son I could find died in 1733. There was also an Oliver Peacock and an Andrew Peacock who were contemporaries of the above William Jr. If there was a junior there must have been a William sr. who was perhaps the original settler ca 1690 and the others sons. This of course is speculation. If you wish, I can send a GEDCOM containing whatever Peacock information I have gleaned from the records. Email me at firstname.lastname@example.org
if you so wish.