I've seen a couple of baptisms and/or marriages around the late 1600s for Vension and most of them seem to have either died or married in the Forest of Dean area. I can't find Vension at all. Has anyone any idea where it is/was? TIA.

There is a Vention near Lower Lydbrook,

http://maps.nls.uk/view/101453361

Also findable on Streetmap as Vention Lane.

Many thanks, Mike. Extremely grateful. The fact that it's not far from Ruardean brings everything in line.

Oh dear ... I must need glasses. I read the title of this post as "venison"!!! (Not unconnected to the Forest, mind.)