There seem to be some solutions on the web:
https://answers.microsoft.com/en-us/...661af80?auth=1
https://stackoverflow.com/questions/...amic-file-name
https://sharepoint.stackexchange.com...nt-online-2013
https://www.experts-exchange.com/que...nt-Online.html
https://officeaccelerators.wordpress...point-library/