Hi,
I'm not sure if there's a connection. The information I have on William is from the online Bishop's Transcripts. I've found a few siblings, Elizabeth b. 1765, Martha 1766-1768, Martha b. 1768, Thomas b. 1771 and Jane b. 1722. I suppose it's possible I haven't found the whole family, but they were all baptised in Blofield.
It's quite possible there's a connection. William's father was John Church, b. 1745. I have no other information about him, so I don't know if he was born/brought up in Wickhampton. Can you let me know if you can find a link please?
Cheers,
Dem