Good.
Stay away from him.
He'll chuck a load of abuse at first.
Possibly threaten, if he threatened anything, report to police on non emergency.
If he arrives where you are, lock yourself in and safe, don't respond, record it if you can.
After this little tantrum period he'll start the gaslighting and begging and promising.
Ignore it.
That's him losing control and trying to gain it back. He'll tell you everything you want to hear, he won't mean any of it. Imagine he's a big toddler who wants a cookie and is promising he'll tidy his toys and clean his room if he gets one.
Don't let that work. Just completely ignore him, don't even respond, just save the messages.
Get a child arrangements order started, easily done online, do that today.
Make it clear you left due to emotional abuse and you're worried that the abuse will negatively impact child etc.
Keep every nasty message, every threatening voicemail, every outburst of anger etc.
Make sure none of your family interact with him at all. Just completely ignore. Don't let your uncle John threaten him or let aunty Brian slap him etc.
Keep your hands clean because of you go to court over anything, they want to see you've done everything right.
Good luck OP.
It's an uphill fight and you may find you weaken. If you do, get back to MN and find some moral support. Vast majority of MN will be rooting for you to have a life free of abuse, especially those who have lived through it. ❤️