The Betfair Historical Data doesn't include the competitionId or competition name.
However, a collection of zip files has been added to the API documentation via https://docs.developer.betfair.com/d...entMappingData for those looking to map historical data eventId's to competition names.
These files are available from 2018-2022 only for Soccer, Tennis, Cricket, Golf, and Other Sports. and are offered 'as is'.
Please note: The historical data packages may not contain all events listed in these files and vice versa. Horse racing and greyhound racing do not have competition names associated with them.