I don't know much about Ogham, but from what I've read, the runic alphabet was probably developed from an alphabet used in northern Italy. That one likely desc

I don't know much about Ogham, but from what I've read, the runic alphabet was probably developed from an alphabet used in northern Italy. That one likely descends from the Etruscan alphabet. It's muddy, as are many things from 2000 years ago, but there seems to be a line of decent back to a preexisting alphabet.