α. Middle English auicion, Middle English auicyon, Middle English auision, Middle English auisioun, Middle English auisiun, Middle English auisyon, Middle English auysion, Middle English auysioun, Middle English auyson, Middle English avicion, Middle English avicioun, Middle English aviciown, Middle English avisioun, Middle English avisyon, Middle English avycioun, Middle English avysion, Middle English avysioun, Middle English avysyon, Middle English avysyoun, Middle English awision, Middle English 1900s– avision, Middle English–1500s auysyon; also Scottish pre-1700 auisioun, pre-1700 avisione, pre-1700 avisioun.
β. late Middle English aduision, late Middle English aduisioun, late Middle English aduysion, 1500s aduysyon, 1800s– advision.