Except that a sett is the burrow of a badger, not a group of them.
The OED classifies that sett with set n1, the action of setting and its derivatives (as opposed to set n2, senses of being a collection). And that sense of sett doesn't appear till the late 19th century, well after cete. (Other meanings of sett: a squared paving stone, esp. of granite; each of the squares in the pattern a tartan; the adjustment of the reeds of a loom necessary for the making of a fabric of a particular texture, and the make of fabric the gives; and a tool or device used for setting, eps. a heavy punch or chisel for use on metal or stone -- whee!).
no subject
The OED classifies that sett with set n1, the action of setting and its derivatives (as opposed to set n2, senses of being a collection). And that sense of sett doesn't appear till the late 19th century, well after cete. (Other meanings of sett: a squared paving stone, esp. of granite; each of the squares in the pattern a tartan; the adjustment of the reeds of a loom necessary for the making of a fabric of a particular texture, and the make of fabric the gives; and a tool or device used for setting, eps. a heavy punch or chisel for use on metal or stone -- whee!).
---L.