I've come across several instances of Rocks marrying LaPortes. Masse's marrying LaPortes. Garrands marrying LaPortes and some of these connections are only a couple of generations apart. I've also come across Rocks marrying Rocks -- my Great Grandparents (Henry) Clayton Rock was the first cousin once removed from his wife, Isabel Rock (Clayton's father Edward "Henry" Rock was the brother of Isabel's grandfather, Moses Rock). But that's the closest that I've seen before this morning, when I came across this:
This is the marriage record of my 5th Great Grandfather, Joseph Souliere to Marie Catherine Menard. The date in the upper right shows a marriage on March 1, 1802 in Contrecoeur, Quebec, Canada. My 5GRGR was the age of "majority" (i.e., an adult) and his wife Catherine was a minor. His father, Piere Suliere (s/k/a Pierre Joseph Noel Souliere -- and some combinations of those given names, usually including "Joseph") had died by this time (he died in April 2, 1790). Joseph's mother is listed as "Marie Charles* Lacroix." Catherine Menard's parents are listed as Theophile Mendard (deceased) and Marie Louise Lacroix.
The astute reader will beat me to the explanation and will have already noticed that the mother of the bride and mother of the groom both are named "Lacroix." Those with French, Latin, or medical backgrounds (or, just large vocabularies) will also have noticed what it says in the upper right corner under "Marriage" and "Contrecoeur" -- "consanguinity," which means "blood relation." I do not know positively yet, but I strongly suspect that Marie Louise and Marie
Charles Charlotte were sisters, making their kids first cousins.
More to report when I find out.
* From other records, this is likely a misstatement or mis-transcription -- I haven't looked closely at the original image yet to determine which it is. Joseph's mother was typically referred to as Marie Charlotte or just Charlotte, usually with the surname "Lacroix," but sometimes also with "Borgeau" "Saraphin" and "Potvin" -- I've not figured out that mystery yet. More later.