Hi there, Philip!
It's great to hear that you are interested in your Jackson family heritage. ☘️
From John Grenham's
website, there are lots of Jackson's all over Ireland with Armagh being the most concentrated! You can also have a look at the House of Names
website where you will see the Jackson family crest and more information about their migration to Australia.
Hopefully our members will be able to give you some more information too!