Reed,
Start with yourself and go back each generation making sure you have the correct people.
When you get to the folks who emigrated from Isle of Man, tell us as much as you know about them--where they lived & died, spouses, census info, etc.
Remember as you go back in time, spelling isn't the greatest nor is accuracy of math.
Kneale often comes out, Kneal, Neal, Neil.
Especially in the older generations, repeating first names can be helpful though so often they were John and Mary.
There are lots of folks here who will try to help you when you can give us more information.
Donna