I thought that renaming CrossRail [2 syllables and states what it is] to The Elizabeth Line [6 syllables of no relevance] was stupid and very 'needy'. HMQ did her bit as she always did but, as has been said, there was a frenzy of using her name in the last couple of years.
Heathrow is 2 syllables and is known far and wide on the globe. It is synonymous with London Airport and anyone wanting to travel to/via the UK will know it is the main gateway.