Help/info on old polearms

[machinist]

I have a couple polearms that I have had since the eighties and was wondering if anyone here had any ideas about age, origin, or usage. I was told the previous owner believed they were from Brittany and from the 1700's or previous. The one with two mounting arms I have seen several examples in photos but never any information. The one with a mounting socket someone told me was similar to a sugar cane cutter that he had seen but that fellow seemed a bit off. I am also considering that they may have been used for the butchering of whales as Bretons were supposedly active in that although I would of course prefer to think of them as stout peasant weapons.
Sorry about the pics, I am using the still function on an old camcorder. Pencil used for scale

.