Well, both vegetables are edible, so I don't see why not.

Can I ask how you know that they have crossed?

I wasn't aware that they could cross...

What would you call them - markins, mampkins, purrows, courgumkins? Halloween could be different, with marrows cut out into scary candlelit faces. Phil

"courgumkins" ROTFL !! ;-))

We never had pumpkins in the north east of Scotland - we used large turnips (swedes)

I used to use swedes too when little. Up in the North East. :o)