Hello horselydown86!
Thanks for the help! The Will is actually for Thomas Games, not John Games, and it makes a difference!
Unfortunatley I am now completely confused as to this family and the names don't clarify anything for me.
I am going back a bit to Merthyr Cynog, and will leave Gwenddwr and Devynock for future research.
Thanks for your kind attention!
Take care and best regards!

Llanfi