A quick bit of Latin naming...

[Ayashi]

I'm having fun with Latin at the moment 

Walterus (Walter...) and Johannula had a number of children. I made the mistake of assuming Johannula was probably Johanna, but have since found out she's actually Jennett. Provided I have the right family, I know her brother's name, his wife's first name, her two sisters' names and who they married (can I find any of them? No... no I cannot)

The children are:
Johannes, Peterus, Thomas, Jacobus, David, Johanes, Hester, and Unknown.

I have been poking at this and found a burial for a Jonah. I had to then wonder- what would Jonah latinise to? Would it go to Johannes (or variations) or would it have a different one? It might mean that I actually have a John and a Jonah.

I have a few Jacobs dotted around the Welsh lines but I just realised that on this occasion it could well be James instead (that took me a while!) I'm assuming Jacob would also become Jacobus so could be either.

This lot are a nuisance no matter which language, frankly 

[GR2]

Jonah is Ionas or Jonas in Latin. Your Johannes and Johanes seem to be two sons called John, the older presumably having died before the birth of the younger.

[Ayashi]

Ah, thanks. That was my original assumption but thought I'd better check! I appear to be descended from one of them. John LEWIS in Wales is a bit of a dead end though lol