The Chechen capital Groznyy has been renamed Dzhokhar in commemoration of the late Chechen separatist leader Dzhokhar Dudayev, the Russian news agency Interfax reported.
It said the Chechen parliament introduced a "relevant correction" to the republic's constitution on Wednesday.
Groznyy was renamed Dzhokhar at the beginning of 1997 under the then Chechen President Zelimkhan Yandarbiyev "however it was not valid because article 114 of the Chechen Constitution still named the Chechen capital Groznyy," the agency said.
BBC Monitoring (http://www.monitor.bbc.co.uk), based in Caversham in southern England, selects and translates information from radio, television, press, news agencies and the Internet from 150 countries in more than 70 languages.