Glad to help, Laura. To answer your question, we're not related except probably way back. DNA tests of just 2 Gellings who are far apart on the big tree (but not your branch) show we likely connect ca 800 years ago, originating from a single male.who probably was on the island then. That's about the time surnames originated. Gelling is a Manx name. Y-DNA analysis shows a distant connection to Kingstons of Northumberland, and there's a branch of them in Ireland too.
There turns out to be a mistake in what I wrote earlier. The statement "Catharine Killey is the daughter of Philip Killey (ca 1690-1763) & Ann Clucas (d 1755)" is almost certainly not true. She now is a mystery to be solved. See messages by Mike on this same thread.