Linguistically, all evidence implies that knitting is a fairly recent invention. There are no ancient legends of knitting like there are legends of spinning and weaving (remember Arachne? Ixzaluoh? Nephthys? Amaterasu? Never mind... the numbers of weaving and spinning gods and mostly goddesses are legion). There are no ancient gods or goddesses who knit, no legend of how it was invented or given by the gods. That lack implies that it is a recent skill, developed after mythologies were established around the world. It's a shame, because I think a knitting goddess would be cool... maybe we could make one up?