different apple ID on my Childs phone in FAMILY SHARING

My apple ID's seem to be all over the place. My son has an APPLE ID of mine that was used for a UK account and only gets used when I am in the UK. I cannot change it on his phone. Is it possible to do that? MY son is Jake I am gary.

See the screen shots of the different IDs on FAMILY SHARING. How do I fix this?