P is for ... Paterson?

I'd been online for two years by the spring of 1995, so my curiosity about family history lead to an AltaVista search for Aberdeenshire church records.  Already there were genealogy sites springing up everywhere, and I learned quickly about the records collections held by the Church of Jesus Christ of Latter-Day Saints (LDS) and their local Family History Centres (FHC), one of which was a mere 30-something blocks from my apartment.  Off I went.

The FHC staff were incredibly helpful and, thanks to the Scottish influence on Canada's history, the Brandon FHC happened to have microfilms of the parish records I wanted to see, so I didn't even have to wait for films to be shipped from Utah!  My mother's research had already identified which parishes I needed to view and Bruce's history had told of my great-great-great-grandfather's twin brother William, so it wasn't too hard to find:

Baptismal Record for William Alexander and James Paterson McEnzie, Kennethmont, 1836

March 21st 1836
William McEnzie Brewer at the Glennoth Distillery had twins by his wife Jean Warrock Born February the 23rd & 24th Baptized & named one William Alexander & younger James Paterson March 10th following
Witnesses John Morrison Elder
Mrs McAdam

P stood for Paterson?  Not Philip, as we'd all suspected?  And the age-old debate about whether we were MacKenzie or McKenzie had been answered with...McEnzie.  These were early days.  It was some time later before I understood that the literacy of the minister, registrar or immigration officer had the greatest influence over the way names were recorded officially.

In later years I found more evidence that I had the right set of twins, not only Canadian land grants to James Paterson (or Patterson) McKenzie but also other family members with the same middle name, who, until the baptismal record was found, had no idea why they bore it.

The Paterson link sent me on a wild goose chase for many years, even finding me wandering through Stirling's cemeteries in the mistaken belief that my Paterson-McKenzie links came from there, before I chanced upon a local history of Kennethmont which said that the village doctor in the 1830s was one James Paterson. 

In retrospect, it made a lot more sense that James, the younger of the twins, was named for the doctor who likely assisted in what could have been a complicated delivery.  It was late at night - the baptismal record shows that the twins were born on either side of midnight - the mother was aged about 28 and this was her first pregnancy, the family had some money: perhaps they sent for the local doctor rather than the local midwife.  The first son was named for his father and grandfather, William McKenzie and Alexander Warrack, and the Warrack tree had no obvious Paterson connections.

So James Paterson McKenzie: named for the local doctor.  Or was he? 

What, really, did I know about his father's family?