イヴァン・アセン2世
Anna (), subsequently known under the religious name Anisia (Анисия), was the first wife of Tsar Ivan Asen II of Bulgaria (r. 1218–1241) and empress consort of the Second Bulgarian Empire from 1218 to 1221. She was exiled to a monastery in the beginning of Ivan Asen's reign, after he arranged his marriage to Anna Maria of Hungary. From his marriage to Anna, Ivan Asen had two children.