Alison is a given name for a female. It was originally a meieval Norman nickname for Alice, meaning "truth," "noble," or "noble type." Also from the Irish name, Iseult. Variations include Allison, Allyson, Alysson, Alyson, and Alisson with nicknames Allie, Ali, and Ally, and Aly and Alli. It also has separate roots as a family name, in which case when used as a given name is traditionally masculine, and is of disputed meaning.