Celtic and Pictish - early Celts and their priests, the Druids, had their own form of alphabet known as “Ogam Bethluisnion”, which was an extremely simple alphabet used more for carving into wood and stone, than for general writing, while Pictish artwork was later adopted by the Celts, especially throughout Ireland (???)
anglo saxon runes--I know I'm a big geek for admitting this but Paul and I used to write letters to each other, share multiple choice answers during tests, etc using this alphabet. I don't remember a bit of it now though!
"Hugin & Munin" The ravens are shown intertwined in knotwork to symbolize their interconnectedness – not only to each other, but also to Odin, the physical world and the knowledge they seek. They are perched on a rune stone upon which is carved a sampling of Futhark (the Norse alphabet) and a depiction of Odin astride his eight-legged horse, Sleipnir. Artist: Aric Jorn